{"id":199,"date":"2026-08-18T23:41:27","date_gmt":"2026-08-18T15:41:27","guid":{"rendered":"https:\/\/www.bgdyx.com\/?p=199"},"modified":"2026-08-18T23:41:32","modified_gmt":"2026-08-18T15:41:32","slug":"%e6%a2%b3%e7%8a%b6%e6%bb%a4%e6%b3%a2%e6%95%88%e5%ba%94%ef%bc%9a%e5%ae%b6%e5%ba%ad%e5%bd%b1%e9%99%a2%e3%80%81%e4%b8%93%e4%b8%9a%e9%9f%b3%e5%93%8d%e4%b8%8e%e5%bd%95%e9%9f%b3%e4%b8%ad%e7%9a%84%e9%9a%90","status":"publish","type":"post","link":"https:\/\/www.bgdyx.com\/index.php\/2026\/08\/18\/%e6%a2%b3%e7%8a%b6%e6%bb%a4%e6%b3%a2%e6%95%88%e5%ba%94%ef%bc%9a%e5%ae%b6%e5%ba%ad%e5%bd%b1%e9%99%a2%e3%80%81%e4%b8%93%e4%b8%9a%e9%9f%b3%e5%93%8d%e4%b8%8e%e5%bd%95%e9%9f%b3%e4%b8%ad%e7%9a%84%e9%9a%90\/","title":{"rendered":"\u68b3\u72b6\u6ee4\u6ce2\u6548\u5e94\uff1a\u5bb6\u5ead\u5f71\u9662\u3001\u4e13\u4e1a\u97f3\u54cd\u4e0e\u5f55\u97f3\u4e2d\u7684\u9690\u5f62\u58f0\u5b66\u6740\u624b"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u270d\ufe0f \u5f20\u4e4b\u5f6c \u00b7 \u6280\u672f\u603b\u76d1\u3000\ud83c\udfe2 \u6210\u90fd\u5b8f\u5a01\u89c6\u542c\u79d1\u6280\u6709\u9650\u516c\u53f8\u3000\ud83d\udcc5 2026-08-18\u3000 \ud83d\udd16 \u6ce2\u7684\u5e72\u6d89 \u00b7 \u4f20\u9012\u51fd\u6570 \u00b7 \u7b2c\u4e00\u53cd\u5c04\u70b9 \u00b7 3:1\u6cd5\u5219<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6210\u90fd\u505a\u5bb6\u5ead\u5f71\u9662\u7cfb\u7edf\u8c03\u8bd5\u7684\u8fd9\u4e9b\u5e74\uff0c\u6211\u9047\u5230\u8fc7\u4e0d\u6b62\u4e00\u6b21\u8fd9\u6837\u7684\u60c5\u51b5\uff1a\u4e1a\u4e3b\u89c9\u5f97&#8221;\u4e24\u53ea\u97f3\u7bb1\u4e00\u8d77\u653e\u58f0\u97f3\u5e94\u8be5\u66f4\u9971\u6ee1&#8221;\uff0c\u4e8e\u662f\u628a\u4e66\u67b6\u7bb1\u548c\u843d\u5730\u7bb1\u540c\u65f6\u5f00\u7740\u653e\u540c\u4e00\u9996\u6b4c\uff0c\u7ed3\u679c\u4eba\u58f0\u53cd\u800c\u53d8\u8584\u3001\u53d8&#8221;\u5851\u6599\u5473&#8221;\uff0c\u67d0\u4e9b\u5b57\u542c\u8d77\u6765\u53d1\u865a\uff1b\u4e5f\u6709\u4e1a\u4e3b\u5728\u5ba2\u5385\u88c5\u4e86\u9876\u7f6e\u97f3\u7bb1 + \u843d\u5730\u97f3\u7bb1\u540c\u65f6\u51fa\u5168\u666f\u58f0\u7684\u5730\u9762\u58f0\u9053\uff0c\u5b9e\u6d4b\u9891\u54cd\u66f2\u7ebf\u4e0a\u51fa\u73b0\u4e00\u6392\u7b49\u95f4\u9694\u7684\u5c16\u9510\u51f9\u9677\u8fd9\u5c31\u662f<strong>\u68b3\u72b6\u6ee4\u6ce2\u6548\u5e94\uff08Comb Filtering\uff09<\/strong>\u5728\u8d77\u4f5c\u7528\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u79cd\u6781\u5176\u5e38\u89c1\u3001\u5374\u7ecf\u5e38\u88ab\u8bef\u8bca\u4e3a&#8221;\u8bbe\u5907\u4e0d\u884c&#8221;\u6216\u8005\u88ab\u548c\u9a7b\u6ce2\u6df7\u4e3a\u4e00\u8c08\u7684\u58f0\u5b66\u73b0\u8c61\u3002\u5b83\u7684\u6570\u5b66\u7ed3\u6784\u5176\u5b9e\u5f88\u7b80\u5355\u2014\u2014\u5c31\u662f\u6ce2\u7684\u5e72\u6d89\u2014\u2014\u4f46\u6b63\u56e0\u4e3a\u7b80\u5355\uff0c\u4e00\u65e6\u7406\u89e3\u4e86\u80cc\u540e\u7684\u7269\u7406\uff0c\u4f60\u4f1a\u53d1\u73b0\u5b83\u65e0\u5904\u4e0d\u5728\uff1a\u623f\u95f4\u53cd\u5c04\u4f1a\u4ea7\u751f\u5b83\uff0c\u6446\u4f4d\u4e0d\u5bf9\u79f0\u7684\u53cc\u97f3\u7bb1\u4f1a\u4ea7\u751f\u5b83\uff0c\u5206\u9891\u5668\u4ea4\u53e0\u533a\u4f1a\u4ea7\u751f\u5b83\uff0c\u5f55\u97f3\u65f6\u7528\u9519\u9ea6\u514b\u98ce\u95f4\u8ddd\u4e5f\u4f1a\u4ea7\u751f\u5b83\u3002\u8fd9\u7bc7\u6587\u7ae0\u628a\u5b83\u7684\u7269\u7406\u6210\u56e0\u3001\u9891\u7387\u8ba1\u7b97\u516c\u5f0f\uff0c\u4ee5\u53ca\u5728\u4e0d\u540c\u573a\u666f\u4e0b\u5bf9\u5e94\u7684\u89c4\u907f\u65b9\u6cd5\uff0c\u4e00\u6b21\u8bb2\u900f\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u5148\u7ea0\u6b63\u4e00\u4e2a\u5e38\u89c1\u8bef\u533a\uff1a<\/strong> \u5f88\u591a\u4eba\u628a&#8221;\u9891\u54cd\u66f2\u7ebf\u4e0d\u5e73\u5766&#8221;\u4e00\u5f8b\u5f52\u56e0\u4e8e\u623f\u95f4\u9a7b\u6ce2\uff0c\u7528\u4f4e\u9891\u9677\u9631\u548c\u591a\u8d85\u4f4e\u97f3\u6446\u4f4d\u53bb\u5e94\u5bf9\uff0c\u7ed3\u679c\u53d1\u73b0\u4e2d\u9ad8\u9891\u4f9d\u7136\u53d1\u95f7\u3001\u5b9a\u4f4d\u6a21\u7cca\u3002\u9a7b\u6ce2\u53ea\u89e3\u91ca\u4e86\u4f4e\u9891\u7a7a\u95f4\u5206\u5e03\u4e0d\u5747\uff0c\u68b3\u72b6\u6ee4\u6ce2\u624d\u662f\u4e2d\u9ad8\u9891&#8221;\u53d1\u95f7\u3001\u53d1\u865a\u3001\u5b9a\u4f4d\u6a21\u7cca&#8221;\u6700\u5e38\u89c1\u4f46\u6700\u5bb9\u6613\u88ab\u5ffd\u89c6\u7684\u771f\u6b63\u5143\u51f6\u2014\u2014\u4e24\u8005\u7269\u7406\u673a\u5236\u5b8c\u5168\u4e0d\u540c\uff0c\u5904\u7406\u65b9\u6cd5\u4e5f\u4e0d\u540c\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u7269\u7406\u6210\u56e0\uff1a\u6ce2\u52a8\u53e0\u52a0\u539f\u7406\u7684\u76f4\u63a5\u4f53\u73b0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u68b3\u72b6\u6ee4\u6ce2\u5e76\u4e0d\u662f\u97f3\u9891\u9886\u57df\u7279\u6709\u7684&#8221;\u602a\u73b0\u8c61&#8221;\uff0c\u5b83\u662f<strong>\u6ce2\u52a8\u65b9\u7a0b\u7ebf\u6027\u53e0\u52a0\u539f\u7406<\/strong>\u5728\u58f0\u5b66\u4e2d\u7684\u76f4\u63a5\u4f53\u73b0\uff0c\u4e0e\u6258\u9a6c\u65af\u00b7\u6768\uff08Thomas Young\uff091801\u5e74\u53cc\u7f1d\u5e72\u6d89\u5b9e\u9a8c\u4e2d\u5149\u6ce2\u4ea7\u751f\u7684\u660e\u6697\u6761\u7eb9\u9075\u5faa\u5b8c\u5168\u76f8\u540c\u7684\u6570\u5b66\u7ed3\u6784\u2014\u2014\u58f0\u6ce2\u548c\u5149\u6ce2\u90fd\u662f\u6ce2\uff0c\u670d\u4ece\u540c\u4e00\u5957\u53e0\u52a0\u539f\u7406\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u53c2\u8003\uff1aKinsler, Frey, Coppens, Sanders, <em>Fundamentals of Acoustics<\/em>, 4th ed., 2000\uff0c\u7b2c\u4e94\u7ae0&#8221;\u6ce2\u7684\u5e72\u6d89\u4e0e\u53e0\u52a0&#8221;<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bbe\u4e00\u4e2a\u58f0\u97f3\u4fe1\u53f7\u540c\u65f6\u7ecf\u7531\u4e24\u6761\u8def\u5f84\u5230\u8fbe\u540c\u4e00\u70b9\uff1a\u4e00\u6761\u662f<strong>\u76f4\u8fbe\u8def\u5f84<\/strong>\uff0c\u53e6\u4e00\u6761\u662f<strong>\u5ef6\u8fdf\u8def\u5f84<\/strong>\uff08\u53ef\u80fd\u662f\u53cd\u5c04\u58f0\uff0c\u4e5f\u53ef\u80fd\u662f\u7b2c\u4e8c\u53ea\u97f3\u7bb1\u3001\u7b2c\u4e8c\u652f\u9ea6\u514b\u98ce\u62fe\u53d6\u7684\u540c\u4e00\u4fe1\u53f7\uff09\uff0c\u4e8c\u8005\u4e4b\u95f4\u5b58\u5728\u4e00\u4e2a\u56fa\u5b9a\u7684\u65f6\u95f4\u5dee <strong>\u0394t<\/strong>\u3002\u4e24\u8def\u4fe1\u53f7\u5728\u8be5\u70b9\u7684\u58f0\u538b\u662f\u7ebf\u6027\u53e0\u52a0\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Formula 01 \u00b7 \u53cc\u8def\u5f84\u58f0\u538b\u53e0\u52a0<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=p_%7Btotal%7D(t)%20%3D%20p_0(t)%20%2B%20%5Crho%20%5Ccdot%20p_0(t%20-%20%5CDelta%20t)%0A%5C%5C\" alt=\"p_{total}(t) = p_0(t) + \\rho \\cdot p_0(t - \\Delta t)\n\\\\\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=p_0(t)\" alt=\"p_0(t)\">\uff1a\u76f4\u8fbe\u58f0\u538b\u4fe1\u53f7<\/li>\n\n\n\n<li><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5Crho\" alt=\"\\rho\">\uff1a\u5ef6\u8fdf\u8def\u5f84\u76f8\u5bf9\u5e45\u5ea6\u6bd4\uff080\uff5e1\uff0c\u5168\u53cd\u5c04\u65f6 \u03c1\u22481\uff09<\/li>\n\n\n\n<li><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5CDelta%20t\" alt=\"\\Delta t\">\uff1a\u4e24\u6761\u8def\u5f84\u7684\u5230\u8fbe\u65f6\u95f4\u5dee\uff08\u79d2\uff09\uff0c<img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5CDelta%20t%20%3D%20%5CDelta%20d%20%2F%20c\" alt=\"\\Delta t = \\Delta d \/ c\">\uff0c\u0394d \u4e3a\u8def\u7a0b\u5dee\uff0c<img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=c%20%5Capprox%20343%5C%20%5Ctext%7Bm%2Fs%7D\" alt=\"c \\approx 343\\ \\text{m\/s}\">\uff0820\u2103\u7a7a\u6c14\u58f0\u901f\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e0a\u5f0f\u505a\u5085\u91cc\u53f6\u53d8\u6362\uff08\u65f6\u57df\u5ef6\u8fdf\u5bf9\u5e94\u9891\u57df\u76f8\u79fb\uff09\uff0c\u53ef\u4ee5\u5f97\u5230\u8fd9\u4e2a&#8221;\u53cc\u8def\u5f84\u7cfb\u7edf&#8221;\u7684<strong>\u5e45\u9891\u4f20\u9012\u51fd\u6570<\/strong>\u2014\u2014\u8fd9\u6b63\u662f&#8221;\u68b3\u72b6\u6ee4\u6ce2\u5668&#8221;\u8fd9\u4e2a\u540d\u5b57\u7684\u6570\u5b66\u6765\u6e90\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u53c2\u8003\uff1aJulius O. Smith III, <em>Introduction to Digital Filters with Audio Applications<\/em>, CCRMA, Stanford University, 2007\uff0c&#8221;Feedforward Comb Filters&#8221;\u4e00\u8282<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Formula 02 \u00b7 \u5e45\u9891\u4f20\u9012\u51fd\u6570\uff08\u4e00\u822c\u5f62\u5f0f\uff0c\u542b\u53cd\u5c04\u8870\u51cf \u03c1\uff09<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%7CH(f)%7C%20%3D%20%5Csqrt%7B1%20%2B%20%5Crho%5E2%20%2B%202%5Crho%5Ccos(2%5Cpi%20f%20%5CDelta%20t)%7D%0A%5C%5C\" alt=\"|H(f)| = \\sqrt{1 + \\rho^2 + 2\\rho\\cos(2\\pi f \\Delta t)}\n\\\\\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53 <img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5Crho%20%3D%201\" alt=\"\\rho = 1\">\uff08\u7406\u60f3\u5168\u53cd\u5c04 \/ \u7b49\u5e45\u4e24\u8def\u4fe1\u53f7\uff09\u65f6\uff0c\u7b80\u5316\u4e3a\u7ecf\u5178\u5f62\u5f0f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%7CH(f)%7C%20%3D%202%5Cleft%7C%5Ccos(%5Cpi%20f%20%5CDelta%20t)%5Cright%7C%0A%5C%5C\" alt=\"|H(f)| = 2\\left|\\cos(\\pi f \\Delta t)\\right|\n\\\\\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u51fd\u6570\u5728\u9891\u7387\u8f74\u4e0a\u4f1a\u5468\u671f\u6027\u5730\u51fa\u73b0\u6700\u5927\u503c\uff08\u76f8\u957f\u5e72\u6d89\uff0c\u58f0\u538b\u53e0\u52a0\u589e\u5f3a\uff09\u548c\u6700\u5c0f\u503c\uff08\u76f8\u6d88\u5e72\u6d89\uff0c\u58f0\u538b\u76f8\u4e92\u62b5\u6d88\uff09\u3002\u6c42\u89e3\u53ef\u5f97\u51f9\u9677\u9891\u7387\u4e0e\u5cf0\u503c\u9891\u7387\u7684\u89e3\u6790\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Formula 03 \u00b7 \u51f9\u9677\u9891\u7387\uff08Notches\uff09\u4e0e\u5cf0\u503c\u9891\u7387\uff08Peaks\uff09<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=f_%7Bnull%7D%20%3D%20%5Cfrac%7B2n-1%7D%7B2%5C%2C%5CDelta%20t%7D%2C%20%5Cquad%20n%20%3D%201%2C%202%2C%203%2C%20%5Cdots%0A%5C%5C\" alt=\"f_{null} = \\frac{2n-1}{2\\,\\Delta t}, \\quad n = 1, 2, 3, \\dots\n\\\\\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=f_%7Bpeak%7D%20%3D%20%5Cfrac%7Bn%7D%7B%5CDelta%20t%7D%2C%20%5Cquad%20n%20%3D%200%2C%201%2C%202%2C%20%5Cdots%0A%5C%5C\" alt=\"f_{peak} = \\frac{n}{\\Delta t}, \\quad n = 0, 1, 2, \\dots\n\\\\\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51f9\u9677\u4e0e\u5cf0\u503c\u5728\u9891\u7387\u8f74\u4e0a<strong>\u7b49\u95f4\u9694\u6392\u5217<\/strong>\uff0c\u95f4\u9694\u5747\u4e3a <img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=1%2F%5CDelta%20t\" alt=\"1\/\\Delta t\">\uff08Hz\uff09\u2014\u2014\u8fd9\u6b63\u662f&#8221;\u68b3\u9f7f&#8221;\u5f62\u6001\u7684\u6570\u5b66\u6765\u6e90<\/li>\n\n\n\n<li>\u0394t \u8d8a\u5c0f \u2192 \u7b2c\u4e00\u4e2a\u51f9\u9677\u9891\u7387\u8d8a\u9ad8\u3001\u68b3\u9f7f\u8d8a&#8221;\u758f&#8221;\uff1b\u0394t \u8d8a\u5927 \u2192 \u7b2c\u4e00\u4e2a\u51f9\u9677\u9891\u7387\u8d8a\u4f4e\u3001\u68b3\u9f7f\u8d8a&#8221;\u5bc6&#8221;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u8def\u7a0b\u5dee\u4e0e\u51f9\u9677\u9891\u7387\u5bf9\u5e94\u8868<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-center\" data-align=\"center\">\u8def\u5f84\u65f6\u95f4\u5dee \u0394t<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u5bf9\u5e94\u8def\u7a0b\u5dee \u0394d\uff0820\u2103\u7a7a\u6c14\uff09<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u7b2c\u4e00\u51f9\u9677\u9891\u7387 f_null (n=1)<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u68b3\u9f7f\u95f4\u9694 1\/\u0394t<\/th><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0.1 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22483.4 cm<\/td><td class=\"has-text-align-center\" data-align=\"center\">5000 Hz<\/td><td class=\"has-text-align-center\" data-align=\"center\">10000 Hz<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0.5 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u224817 cm<\/td><td class=\"has-text-align-center\" data-align=\"center\">1000 Hz<\/td><td class=\"has-text-align-center\" data-align=\"center\">2000 Hz<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u224834 cm<\/td><td class=\"has-text-align-center\" data-align=\"center\">500 Hz<\/td><td class=\"has-text-align-center\" data-align=\"center\">1000 Hz<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">2 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u224869 cm<\/td><td class=\"has-text-align-center\" data-align=\"center\">250 Hz<\/td><td class=\"has-text-align-center\" data-align=\"center\">500 Hz<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">5 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22481.7 m<\/td><td class=\"has-text-align-center\" data-align=\"center\">100 Hz<\/td><td class=\"has-text-align-center\" data-align=\"center\">200 Hz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u5173\u952e\u5de5\u7a0b\u610f\u4e49\uff1a<\/strong> \u8def\u7a0b\u5dee\u53ea\u8981\u662f\u51e0\u5398\u7c73\u5230\u51e0\u7c73\u8fd9\u4e2a\u91cf\u7ea7\u2014\u2014\u51e0\u4e4e\u662f\u5bb6\u5ead\u5f71\u9662\u548c\u5f55\u97f3\u68da\u91cc&#8221;\u4e24\u6761\u58f0\u8def\u5f84&#8221;\u6700\u5e38\u89c1\u7684\u5c3a\u5ea6\u5dee\u2014\u2014\u51f9\u9677\u9891\u7387\u5c31\u6070\u597d\u843d\u5728 100 Hz\uff5e5000 Hz \u4e4b\u95f4\uff0c\u8986\u76d6\u4e86\u4eba\u58f0\u57fa\u9891\u3001\u8bed\u8a00\u53ef\u61c2\u5ea6\u5173\u952e\u9891\u6bb5\uff08500 Hz\uff5e4 kHz\uff09\u548c\u5927\u90e8\u5206\u4e50\u5668\u7684\u57fa\u97f3\u533a\u57df\u3002\u8fd9\u662f\u68b3\u72b6\u6ee4\u6ce2\u5bf9\u542c\u611f\u7834\u574f\u529b\u7279\u522b\u5927\u7684\u6839\u672c\u539f\u56e0\uff1a\u5b83\u7cbe\u786e\u6253\u5728\u4eba\u8033\u6700\u654f\u611f\u3001\u5185\u5bb9\u4fe1\u606f\u6700\u5bc6\u96c6\u7684\u9891\u6bb5\u4e0a\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u53cd\u5c04\u8870\u51cf\u7cfb\u6570 \u03c1 \u51b3\u5b9a\u51f9\u9677&#8221;\u6df1\u4e0d\u6df1&#8221;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5b9e\u4e2d\u7684\u53cd\u5c04\u9762\u4e0d\u4f1a\u662f100%\u5168\u53cd\u5c04\uff0c\u4f1a\u5438\u6536\u4e00\u90e8\u5206\u58f0\u80fd\u3002\u53cd\u5c04\u7cfb\u6570\uff08\u538b\u529b\u5e45\u5ea6\u6bd4\uff09\u4e0e\u5438\u58f0\u7cfb\u6570 \u03b1 \u7684\u5173\u7cfb\u4e3a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5Crho%20%3D%20%5Csqrt%7B1%20-%20%5Calpha%7D%0A%5C%5C\" alt=\"\\rho = \\sqrt{1 - \\alpha}\n\\\\\"\/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u53c2\u8003\uff1aKinsler et al., <em>Fundamentals of Acoustics<\/em>, \u7b2c6\u7ae0<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u5165 Formula 02\uff0c\u53ef\u4ee5\u7b97\u51fa\u4e0d\u540c\u5438\u58f0\u6761\u4ef6\u4e0b\u5cf0\u503c \/ \u51f9\u9677\u7684\u5b9e\u9645\u6df1\u5ea6\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-center\" data-align=\"center\">\u03c1 \u503c<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u5438\u58f0\u7cfb\u6570 \u03b1<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u5cf0\u503c<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u51f9\u9677\u6df1\u5ea6<\/th><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u03c1 = 1.0<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u03b1 = 0\uff08\u88f8\u5899\/\u73bb\u7483\/\u74f7\u7816\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">+6.0 dB<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u2212\u221e dB\uff08\u5b8c\u5168\u76f8\u6d88\uff09<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u03c1 = 0.7<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u03b1 \u2248 0.51\uff08\u4e2d\u7b49\u5438\u58f0\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">+4.6 dB<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u221210.5 dB<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">\u03c1 = 0.3<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u03b1 \u2248 0.91\uff08\u5f3a\u5438\u58f0\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">+2.3 dB<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u22123.1 dB<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7ec4\u6570\u636e\u63ed\u793a\u4e86\u4e00\u4e2a\u91cd\u8981\u5de5\u7a0b\u7ed3\u8bba\uff1a<strong>\u5438\u58f0\u5904\u7406\u65e0\u6cd5\u8ba9\u68b3\u72b6\u6ee4\u6ce2&#8221;\u6d88\u5931&#8221;\uff0c\u4f46\u80fd\u5927\u5e45\u6536\u7a84\u51f9\u9677\u6df1\u5ea6<\/strong>\u2014\u2014\u4ece\u7406\u8bba\u4e0a\u7684\u65e0\u7a77\u6df1\u538b\u7f29\u5230\u5de5\u7a0b\u4e0a\u53ef\u63a5\u53d7\u7684\u51e0\u4e2a dB\u3002\u8fd9\u4e5f\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48\u4e13\u4e1a\u5f55\u97f3\u68da\u548c\u9ad8\u6807\u51c6\u5bb6\u5ead\u5f71\u9662\u7684\u7b2c\u4e00\u53cd\u5c04\u70b9\uff0c\u51e0\u4e4e\u4ece\u4e0d\u7559\u88f8\u9732\u7684\u786c\u8d28\u8868\u9762\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u56db\u5927\u5178\u578b\u573a\u666f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8981\u6ee1\u8db3&#8221;\u540c\u4e00\u4fe1\u53f7\u3001\u4e24\u6761\uff08\u6216\u66f4\u591a\uff09\u8def\u5f84\u3001\u56fa\u5b9a\u65f6\u95f4\u5dee\u3001\u5728\u67d0\u4e00\u70b9\u76f8\u5e72\u53e0\u52a0&#8221;\u8fd9\u4e2a\u6761\u4ef6\uff0c\u68b3\u72b6\u6ee4\u6ce2\u5c31\u4f1a\u53d1\u751f\u3002\u5728\u97f3\u54cd\u5de5\u7a0b\u5b9e\u8df5\u4e2d\uff0c\u6700\u5e38\u89c1\u7684\u56db\u7c7b\u573a\u666f\u662f\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th class=\"has-text-align-left\" data-align=\"left\">\u573a\u666f<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u5178\u578b \u0394t \u91cf\u7ea7<\/th><th class=\"has-text-align-center\" data-align=\"center\">\u4e3b\u8981\u53d7\u5f71\u54cd\u9891\u6bb5<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u5178\u578b\u542c\u611f\u8868\u73b0<\/th><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u2460 \u623f\u95f4\u7b2c\u4e00\u53cd\u5c04\u70b9<\/strong>\uff08\u4fa7\u5899\/\u5929\u82b1\u677f\/\u5730\u9762\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.5\uff5e3 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">300 Hz\uff5e3 kHz<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u58f0\u97f3\u53d1\u95f7\u3001\u5b9a\u4f4d\u6a21\u7cca\u3001\u5931\u53bb\u900f\u660e\u5ea6<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u2461 \u53cc\u97f3\u7bb1\/\u53cc\u8d85\u4f4e\u97f3\u6446\u4f4d\u4e0d\u5bf9\u79f0<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1\uff5e5 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u53d6\u51b3\u4e8e\u8ddd\u79bb\u5dee\uff0c\u53ef\u8986\u76d6\u4f4e\u9891\u5230\u4e2d\u9ad8\u9891<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4eba\u58f0\u53d8\u8584\u53d1\u865a\uff0c\u6216\u7279\u5b9a\u4f4e\u9891\u6bb5\u6d88\u5931<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u2462 \u5206\u9891\u5668\u4ea4\u53e0\u533a<\/strong>\uff08\u4e24\u53ea\u5355\u5143\u540c\u65f6\u53d1\u58f0\u9891\u6bb5\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u6570\u5341 \u03bcs\uff5e1 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u5206\u9891\u70b9\u9644\u8fd1 \u00b11 \u4e2a\u516b\u5ea6<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5206\u9891\u70b9\u5904\u51fa\u73b0\u542c\u611f\u65ad\u5c42\u6216\u9f7f\u97f3\u5f02\u5e38<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u2463 \u53cc\u9ea6\u514b\u98ce\u62fe\u97f3\u4e32\u97f3<\/strong>\uff08\u5f55\u97f3\/\u76f4\u64ad\uff09<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1\uff5e10 ms<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u4eba\u58f0\u57fa\u9891\u4e0e\u5171\u632f\u5cf0\u533a<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4eba\u58f0\u5355\u8584\u3001\u53d1&#8221;\u5c16&#8221;\u3001\u7f3a\u4e4f\u539a\u5ea6\u611f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\u4e00\uff1a\u623f\u95f4\u7b2c\u4e00\u53cd\u5c04\u70b9<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u5bb6\u5ead\u5f71\u9662\u91cc\u6700\u5e38\u89c1\u3001\u4e5f\u662f\u672c\u7ad9\u5728\u300a\u5bb6\u5ead\u5f71\u9662\u58f0\u97f3\u6d51\u6d4a\u4e0d\u6e05\u6670\u300b\u4e00\u6587\u4e2d\u91cd\u70b9\u8ba8\u8bba\u8fc7\u7684\u6210\u56e0\u3002\u97f3\u7bb1\u53d1\u51fa\u7684\u58f0\u97f3\uff0c\u9664\u4e86\u76f4\u63a5\u5230\u8fbe\u8033\u6735\u7684\u76f4\u8fbe\u58f0\uff0c\u8fd8\u4f1a\u7ecf\u7531\u4fa7\u5899\u3001\u5929\u82b1\u677f\u3001\u5730\u9762\u53cd\u5c04\u540e\u518d\u5230\u8fbe\u8033\u6735\uff0c\u53cd\u5c04\u8def\u5f84\u6bd4\u76f4\u8fbe\u8def\u5f84\u591a\u8d70\u7684\u8ddd\u79bb \u0394d\uff0c\u5c31\u51b3\u5b9a\u4e86 <img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5CDelta%20t%20%3D%20%5CDelta%20d%20%2F%20c\" alt=\"\\Delta t = \\Delta d \/ c\">\uff0c\u8fdb\u800c\u51b3\u5b9a\u4e86\u51f9\u9677\u9891\u7387\u3002\u4fa7\u5899\u53cd\u5c04\u901a\u5e38\u8def\u7a0b\u5dee\u5728 0.3\uff5e1 m \u91cf\u7ea7\uff0c\u6070\u597d\u628a\u51f9\u9677\u6253\u5728 300\uff5e1000 Hz \u8fd9\u4e2a\u4eba\u58f0\u57fa\u9891\u4e0e\u8bed\u8a00\u53ef\u61c2\u5ea6\u6838\u5fc3\u9891\u6bb5\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\u4e8c\uff1a\u53cc\u97f3\u7bb1\/\u53cc\u8d85\u4f4e\u97f3\u6446\u4f4d\u4e0d\u5bf9\u79f0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4e24\u53ea\u64ad\u653e\u540c\u4e00\u4fe1\u53f7\u7684\u97f3\u7bb1\u5230\u8046\u542c\u4f4d\u7f6e\u7684<strong>\u8ddd\u79bb\u4e0d\u76f8\u7b49<\/strong>\uff0c\u5c31\u5f62\u6210\u4e86\u4e00\u6761\u56fa\u5b9a\u7684\u8def\u5f84\u5dee\uff0c\u4ea7\u751f\u68b3\u72b6\u6ee4\u6ce2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3e\u4f8b\uff1a\u4e24\u53ea\u8d85\u4f4e\u97f3\u5230\u4e3b\u542c\u4f4d\u7684\u8ddd\u79bb\u76f8\u5dee 1 m\uff0c<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=%5CDelta%20t%20%3D%20%5Cfrac%7B1%7D%7B343%7D%20%5Capprox%202.92%5C%20%5Ctext%7Bms%7D%0A%5C%5C\" alt=\"\\Delta t = \\frac{1}{343} \\approx 2.92\\ \\text{ms}\n\\\\\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u51f9\u9677\u9891\u7387\u7ea6 171 Hz\u2014\u2014\u6070\u597d\u843d\u5728\u8d85\u4f4e\u97f3\u7684\u6838\u5fc3\u5de5\u4f5c\u9891\u6bb5\uff0c\u67d0\u4e2a\u5177\u4f53\u4f4e\u97f3\u97f3\u7b26\u53ef\u80fd\u56e0\u6b64\u88ab\u5927\u5e45\u524a\u5f31\u751a\u81f3\u51e0\u4e4e\u6d88\u5931\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u91cd\u8981\u8865\u5145\uff1a<\/strong> \u591a\u8d85\u4f4e\u97f3\u56db\u89d2\u6446\u4f4d\u662f\u4e3a\u4e86\u6253\u6563\u9a7b\u6ce2\u7a7a\u95f4\u5206\u5e03\uff0c\u4f46\u540c\u65f6\u5fc5\u987b\u4fdd\u8bc1\u5404\u70ae\u5230\u4e3b\u542c\u4f4d\u7684\u8ddd\u79bb\u5c3d\u91cf\u76f8\u7b49\uff08\u6216\u7528 DSP \u505a\u5ef6\u65f6\u8865\u507f\uff09\uff0c\u5426\u5219\u4f1a\u5728\u6446\u4f4d\u5206\u6563\u7684\u540c\u65f6\u5f15\u5165\u65b0\u7684\u68b3\u72b6\u6ee4\u6ce2\u95ee\u9898\u2014\u2014\u8fd9\u662f\u4e24\u4e2a\u9700\u8981\u540c\u65f6\u517c\u987e\u3001\u4f46\u5e38\u88ab\u5de5\u7a0b\u5b9e\u8df5\u5ffd\u7565\u7684\u72ec\u7acb\u7ef4\u5ea6\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\u4e09\uff1a\u5206\u9891\u5668\u4ea4\u53e0\u533a<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u5355\u5143\u97f3\u7bb1\u5728\u5206\u9891\u70b9\u9644\u8fd1\uff0c\u4e24\u53ea\u5355\u5143\u4f1a\u540c\u65f6\u53d1\u51fa\u63a5\u8fd1\u7684\u9891\u7387\u6210\u5206\u3002\u5982\u679c\u5206\u9891\u5668\u8bbe\u8ba1\u4e0d\u5f53\uff08\u9636\u6570\u592a\u4f4e\u3001\u4e24\u5355\u5143\u58f0\u5b66\u4e2d\u5fc3\u4e0d\u5728\u540c\u4e00\u5782\u76f4\u9762\u4e0a\u5bfc\u81f4\u58f0\u5b66\u8def\u5f84\u5dee\uff09\uff0c\u4ea4\u53e0\u9891\u6bb5\u4f1a\u4ea7\u751f\u8f7b\u5fae\u7684\u68b3\u72b6\u6ee4\u6ce2\uff0c\u8868\u73b0\u4e3a\u5206\u9891\u70b9\u9644\u8fd1\u542c\u611f\u7684&#8221;\u65ad\u5c42\u611f&#8221;\u6216\u7fa4\u5ef6\u8fdf\u5f02\u5e38\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u4e13\u4e1a\u97f3\u7bb1\u5206\u9891\u5668\u8bbe\u8ba1\u4e2d\uff0c<strong>Linkwitz-Riley\uff08LR\uff09\u6ee4\u6ce2\u5668\u7ed3\u6784<\/strong>\u4f1a\u88ab\u5e7f\u6cdb\u91c7\u7528\u2014\u2014LR4\uff08\u56db\u9636\uff0c\u221224 dB\/oct\uff09\u5728\u4ea4\u53e0\u70b9\u5904\u4e24\u8def\u4fe1\u53f7\u76f8\u4f4d\u5dee\u6070\u597d\u4e3a 180\u00b0\u3001\u5e45\u5ea6\u5404\u964d\u81f3 \u22126 dB\uff0c\u5408\u6210\u540e\u5e45\u9891\u54cd\u5e94\u5728\u4ea4\u53e0\u70b9\u4fdd\u6301\u5e73\u5766\uff0c\u4e14\u4ea4\u53e0\u5e26\u5bbd\u6bd4\u4e00\u9636\/\u4e8c\u9636\u6ee4\u6ce2\u5668\u7a84\u5f97\u591a\uff0c\u80fd\u663e\u8457\u538b\u7f29\u68b3\u72b6\u6ee4\u6ce2\u7684\u5f71\u54cd\u8303\u56f4\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u573a\u666f\u56db\uff1a\u53cc\u9ea6\u514b\u98ce\u62fe\u97f3\u4e32\u97f3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u4e24\u652f\u9ea6\u514b\u98ce\u540c\u65f6\u62fe\u53d6\u540c\u4e00\u4e2a\u58f0\u6e90\uff08\u6bd4\u5982\u53e3\u64ad\u65f6\u7684\u4e3b\u9ea6 + \u9886\u5939\u9ea6\uff0c\u6216\u591a\u673a\u4f4d\u91c7\u8bbf\uff09\uff0c\u5982\u679c\u4e24\u652f\u9ea6\u514b\u98ce\u5230\u58f0\u6e90\u7684\u8ddd\u79bb\u4e0d\u540c\u3001\u4e14\u90fd\u80fd\u62fe\u53d6\u5230\u660e\u663e\u7535\u5e73\u7684\u58f0\u6e90\u4fe1\u53f7\uff0c\u6df7\u97f3\u65f6\u53e0\u52a0\u5c31\u4f1a\u4ea7\u751f\u68b3\u72b6\u6ee4\u6ce2\uff0c\u4eba\u58f0\u542c\u8d77\u6765\u5355\u8584\u3001\u53d1&#8221;\u5c16&#8221;\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u5982\u4f55\u7528 REW \u8bca\u65ad\u68b3\u72b6\u6ee4\u6ce2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bca\u65ad\u68b3\u72b6\u6ee4\u6ce2\uff0c\u6838\u5fc3\u5de5\u5177\u4f9d\u7136\u662f <strong>REW\uff08Room EQ Wizard\uff09<\/strong> \u914d\u5408\u6821\u51c6\u9ea6\u514b\u98ce\uff08\u5982 UMIK-1\uff09\uff0c\u4f46\u770b\u7684\u91cd\u70b9\u548c\u770b\u9a7b\u6ce2\u4e0d\u4e00\u6837\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud83d\udcc8 \u770b\u9891\u54cd\u66f2\u7ebf\u7684&#8221;\u5f62\u6001\u7279\u5f81&#8221;<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9a7b\u6ce2\u8868\u73b0\u4e3a\u4f4e\u9891\u6bb5\uff08\u901a\u5e38 &lt;300 Hz\uff09\u5c11\u6570\u51e0\u4e2a\u5bbd\u800c\u6df1\u7684\u5cf0\u8c37\uff1b\u68b3\u72b6\u6ee4\u6ce2\u8868\u73b0\u4e3a\u4e00\u7cfb\u5217<strong>\u7a84\u800c\u5bc6\u3001\u7b49\u95f4\u9694\u91cd\u590d\u51fa\u73b0\u7684\u51f9\u9677<\/strong>\uff0c\u51f9\u9677\u5bbd\u5ea6\u901a\u5e38\u8fdc\u5c0f\u4e8e\u95f4\u9694\uff0c\u89c6\u89c9\u4e0a\u5c31\u662f&#8221;\u68b3\u5b50&#8221;\u7684\u6837\u5b50\uff0c\u4e14\u53ef\u4ee5\u51fa\u73b0\u5728\u4e2d\u9ad8\u9891\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u23f1\ufe0f \u770b\u8109\u51b2\u54cd\u5e94\uff08Impulse Response\uff09\u5b9a\u4f4d\u53cd\u5c04\u6e90<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8109\u51b2\u54cd\u5e94\u56fe\u4e0a\uff0c\u4e3b\u8109\u51b2\u4e4b\u540e\u82e5\u5e72\u6beb\u79d2\u51fa\u73b0\u7684\u6b21\u7ea7\u8109\u51b2\u5c31\u662f\u53cd\u5c04\u58f0\uff0c\u5176\u65f6\u95f4\u4f4d\u7f6e\u76f4\u63a5\u5bf9\u5e94 \u0394t\uff0c\u4ee3\u5165\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=f_%7Bnull%7D%20%3D%20%5Cfrac%7B1%7D%7B2%5CDelta%20t%7D%0A%5C%5C\" alt=\"f_{null} = \\frac{1}{2\\Delta t}\n\\\\\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u53cd\u7b97\u51fa\u5bf9\u5e94\u7684\u7b2c\u4e00\u51f9\u9677\u9891\u7387\uff0c\u4e0e\u9891\u54cd\u56fe\u4e0a\u89c2\u5bdf\u5230\u7684\u51f9\u9677\u4f4d\u7f6e\u4e92\u76f8\u9a8c\u8bc1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud83c\udf0a \u770b\u7011\u5e03\u56fe\uff08Waterfall \/ Spectrogram\uff09<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7011\u5e03\u56fe\u4e0a\uff0c\u68b3\u72b6\u6ee4\u6ce2\u51f9\u9677\u5bf9\u5e94\u7684\u9891\u7387\u4f1a\u663e\u793a\u51fa\u5feb\u901f\u8870\u51cf\u4f46\u5e45\u5ea6\u6301\u7eed\u504f\u4f4e\u7684\u7279\u5f81\uff0c\u800c\u9a7b\u6ce2\u5cf0\u503c\u533a\u57df\u5219\u8868\u73b0\u4e3a\u8870\u51cf\u660e\u663e\u504f\u6162\uff08\u62d6\u5c3e\u957f\uff09\u3002\u4e8c\u8005\u65f6\u57df\u7279\u5f81\u4e0d\u540c\uff0c\u53ef\u7528\u4e8e\u4ea4\u53c9\u786e\u8ba4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\ud83e\udded \u79fb\u52a8\u9ea6\u514b\u98ce\u505a\u7a7a\u95f4\u9a8c\u8bc1<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u6d4b\u91cf\u9ea6\u514b\u98ce\u524d\u540e\u79fb\u52a8\u51e0\u5398\u7c73\u5230\u5341\u51e0\u5398\u7c73\uff0c\u68b3\u72b6\u6ee4\u6ce2\u7684\u51f9\u9677\u9891\u7387\u4f1a\u968f\u4e4b<strong>\u660e\u663e\u6f02\u79fb<\/strong>\uff08\u56e0\u4e3a \u0394d\u3001\u0394t \u968f\u4f4d\u7f6e\u53d8\u5316\uff09\uff1b\u9a7b\u6ce2\u7684\u5cf0\u8c37\u4f4d\u7f6e\u5219\u76f8\u5bf9\u7a33\u5b9a\uff08\u7531\u623f\u95f4\u5c3a\u5bf8\u51b3\u5b9a\uff09\uff0c\u79fb\u52a8\u54cd\u5e94\u53d8\u5316\u89c4\u5f8b\u5b8c\u5168\u4e0d\u540c\uff0c\u662f\u6700\u76f4\u89c2\u7684\u73b0\u573a\u533a\u5206\u65b9\u6cd5\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u89c4\u907f\u65b9\u6cd5\uff1a\u4e09\u7c7b\u5904\u7406\u624b\u6bb5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u2460 \u7b2c\u4e00\u53cd\u5c04\u70b9\uff1a\u5438\u58f0\u6216\u6269\u6563\u5904\u7406\uff0c\u6253\u65ad\/\u5206\u6563\u955c\u9762\u53cd\u5c04<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7528\u4e00\u9762\u5c0f\u955c\u5b50\u8d34\u9760\u4fa7\u5899\u3001\u5750\u5728\u8046\u542c\u4f4d\uff0c\u80fd\u5728\u955c\u5b50\u91cc\u770b\u5230\u97f3\u7bb1\u9ad8\u97f3\u5355\u5143\u7684\u4f4d\u7f6e\u5c31\u662f\u7b2c\u4e00\u53cd\u5c04\u70b9\uff08\u58f0\u5b66\u955c\u50cf\u539f\u7406\uff0c\u5165\u5c04\u89d2 = \u53cd\u5c04\u89d2\uff09\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5438\u58f0\u5904\u7406<\/strong>\uff1a\u5728\u6b64\u5904\u5e03\u7f6e\u539a\u5ea6 \u2265 50 mm \u7684\u5438\u58f0\u6750\u6599\uff0c\u53ef\u76f4\u63a5\u524a\u5f31\u53cd\u5c04\u80fd\u91cf\uff08\u964d\u4f4e \u03c1\uff0c\u6536\u7a84\u51f9\u9677\u6df1\u5ea6\uff09<\/li>\n\n\n\n<li><strong>\u6269\u6563\u5904\u7406<\/strong>\uff1a\u82e5\u7528\u4e8c\u6b21\u4f59\u6570\u6269\u6563\u4f53\uff08QRD\uff09\u5c06\u53cd\u5c04\u80fd\u91cf\u5206\u6563\u5230\u4e0d\u540c\u65b9\u5411\u548c\u5230\u8fbe\u65f6\u95f4\uff0c\u7b49\u6548\u4e8e\u628a\u5355\u4e00 \u0394t \u7684\u5f3a\u76f8\u5e72\u53e0\u52a0\u6253\u6563\u6210\u591a\u4e2a\u4e0d\u540c \u0394t \u7684\u5f31\u76f8\u5e72\u53e0\u52a0\uff0c\u628a\u5c16\u9510\u7684\u7a84\u5e26\u51f9\u9677&#8221;\u644a\u5e73&#8221;\u6210\u66f4\u6d45\u3001\u66f4\u5bbd\u7684\u8d77\u4f0f\u2014\u2014\u8fd9\u662f\u4e13\u4e1a\u5f55\u97f3\u68da\u548c\u9ad8\u6807\u51c6\u5bb6\u5ead\u5f71\u9662\u666e\u904d\u4f18\u5148\u9009\u62e9<strong>\u6269\u6563\u800c\u975e\u7eaf\u5438\u6536<\/strong>\u5904\u7406\u7b2c\u4e00\u53cd\u5c04\u70b9\u7684\u7269\u7406\u539f\u56e0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u2461 \u53cc\u97f3\u7bb1\/\u53cc\u8d85\u4f4e\u97f3\uff1a\u4fdd\u8bc1\u7b49\u8ddd\u6446\u4f4d\uff0c\u6216\u7528 DSP \u505a\u5ef6\u65f6\u8865\u507f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u53ea\u97f3\u7bb1\/\u8d85\u4f4e\u97f3\u64ad\u653e\u540c\u4e00\u4fe1\u53f7\u65f6\uff0c\u5c3d\u91cf\u4fdd\u8bc1\u5404\u53ea\u5230\u4e3b\u542c\u4f4d\u7684\u8ddd\u79bb\u76f8\u7b49\uff1b\u786e\u5b9e\u65e0\u6cd5\u7b49\u8ddd\uff08\u6bd4\u5982\u53d7\u9650\u4e8e\u623f\u95f4\u7ed3\u6784\uff09\uff0c\u5219\u901a\u8fc7 AV \u529f\u653e\u6216 DSP \u5904\u7406\u5668\u7684&#8221;\u626c\u58f0\u5668\u8ddd\u79bb\/\u5ef6\u65f6&#8221;\u53c2\u6570\uff0c\u4eba\u4e3a\u8865\u507f\u8def\u5f84\u5dee\u5e26\u6765\u7684\u5230\u8fbe\u65f6\u95f4\u5dee\uff0c\u4f7f\u5404\u8def\u5f84\u5728\u8046\u542c\u4f4d\u7f6e\u91cd\u65b0\u5bf9\u9f50\uff0c\u4ece\u6839\u6e90\u4e0a\u6d88\u9664\u56fa\u5b9a \u0394t \u5bfc\u81f4\u7684\u76f8\u6d88\u5e72\u6d89\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2462 \u5206\u9891\u5668\u4e0e\u5f55\u97f3\u573a\u666f\uff1a\u9009\u5bf9\u6ee4\u6ce2\u5668\u9636\u6570 + 3:1 \u9ea6\u514b\u98ce\u6cd5\u5219<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u97f3\u7bb1\u5206\u9891\u5668<\/strong>\uff1a\u4f18\u5148\u9009\u62e9 Linkwitz-Riley \u9ad8\u9636\uff08LR4 \u53ca\u4ee5\u4e0a\uff09\u8bbe\u8ba1\uff0c\u538b\u7f29\u4ea4\u53e0\u5e26\u5bbd\uff1b\u591a\u5355\u5143\u97f3\u7bb1\u5b89\u88c5\u65f6\u4fdd\u8bc1\u5404\u5355\u5143\u58f0\u5b66\u4e2d\u5fc3\u5c3d\u91cf\u5728\u540c\u4e00\u5782\u76f4\u57fa\u51c6\u9762\uff08\u65f6\u95f4\u5bf9\u9f50\uff09<\/li>\n\n\n\n<li><strong>\u5f55\u97f3\/\u53e3\u64ad\u591a\u9ea6\u514b\u98ce\u573a\u666f<\/strong>\uff1a\u9075\u5faa <strong>3:1 \u6cd5\u5219\uff08Distance Rule\uff09<\/strong>\u2014\u2014\u4e24\u652f\u9ea6\u514b\u98ce\u7684\u95f4\u8ddd\u5e94\u81f3\u5c11\u4e3a\u9ea6\u514b\u98ce\u5230\u5404\u81ea\u58f0\u6e90\u8ddd\u79bb\u7684 3 \u500d\uff0c\u628a\u4e32\u97f3\u7684\u7535\u5e73\u5dee\u548c\u65f6\u95f4\u5dee\u90fd\u62c9\u5927\u5230\u5de5\u7a0b\u4e0a\u53ef\u5ffd\u7565\u7684\u8303\u56f4<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=d_%7Bmic-to-mic%7D%20%5Cgeq%203%20%5Ctimes%20d_%7Bmic-to-source%7D%0A%5C%5C\" alt=\"d_{mic-to-mic} \\geq 3 \\times d_{mic-to-source}\n\\\\\"\/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u53c2\u8003\uff1aGlen Ballou (ed.), <em>Handbook for Sound Engineers<\/em>, 5th ed., Focal Press, 2015\uff0c\u591a\u9ea6\u514b\u98ce\u6280\u672f\u7ae0\u8282<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u5de5\u7a0b\u601d\u8def\u603b\u7ed3\uff1a<\/strong> \u68b3\u72b6\u6ee4\u6ce2\u7684\u56db\u79cd\u89c4\u907f\u624b\u6bb5\uff0c\u672c\u8d28\u4e0a\u90fd\u662f\u5728\u505a\u540c\u4e00\u4ef6\u4e8b\u2014\u2014<strong>\u6d88\u9664\u56fa\u5b9a\u7684\u8def\u5f84\u65f6\u95f4\u5dee\uff0c\u6216\u8005\u628a\u5355\u4e00\u5f3a\u76f8\u5e72\u53e0\u52a0\u6253\u6563\u6210\u591a\u4e2a\u5f31\u76f8\u5e72\u53e0\u52a0<\/strong>\u3002\u524d\u8005\uff08\u7b49\u8ddd\u6446\u4f4d\u3001DSP \u5ef6\u65f6\u8865\u507f\u3001\u6ee4\u6ce2\u5668\u65f6\u95f4\u5bf9\u9f50\uff09\u662f&#8221;treat the cause&#8221;\uff0c\u540e\u8005\uff08\u6269\u6563\u5904\u7406\u30013:1 \u6cd5\u5219\uff09\u662f&#8221;reduce the coherence&#8221;\uff0c\u4e8c\u8005\u53ef\u4ee5\u540c\u65f6\u4f7f\u7528\uff0c\u6548\u679c\u53e0\u52a0\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u8bb0\u4f4f\u8fd9\u4e09\u53e5\u8bdd\uff0c\u5c31\u6293\u4f4f\u4e86\u68b3\u72b6\u6ee4\u6ce2\u7684\u6838\u5fc3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7269\u7406\u672c\u8d28<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u4e00\u4fe1\u53f7\u3001\u4e24\u6761\u8def\u5f84\u3001\u56fa\u5b9a\u65f6\u95f4\u5dee\u3001\u76f8\u5e72\u53e0\u52a0\u2014\u2014\u51f9\u9677 \/ \u5cf0\u503c\u9891\u7387\u53ea\u53d6\u51b3\u4e8e \u0394t\uff0c\u95f4\u9694\u6052\u4e3a <img decoding=\"async\" src=\"\/\/www.zhihu.com\/equation?tex=1%2F%5CDelta%20t\" alt=\"1\/\\Delta t\">\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e0e\u9a7b\u6ce2\u7684\u533a\u5206<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9a7b\u6ce2\u7531\u623f\u95f4\u5c3a\u5bf8\u51b3\u5b9a\u3001\u96c6\u4e2d\u5728\u4f4e\u9891\u3001\u5cf0\u8c37\u5bbd\u800c\u62d6\u5c3e\u957f\uff1b\u68b3\u72b6\u6ee4\u6ce2\u7531\u8def\u5f84\u5dee\u51b3\u5b9a\u3001\u53ef\u51fa\u73b0\u5728\u4efb\u610f\u9891\u6bb5\u3001\u51f9\u9677\u7a84\u800c\u8870\u51cf\u5feb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5904\u7406\u539f\u5219<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u4e48\u6d88\u9664\u8def\u5f84\u65f6\u95f4\u5dee\uff08\u7b49\u8ddd\u6446\u4f4d\u3001\u5ef6\u65f6\u8865\u507f\u3001\u65f6\u95f4\u5bf9\u9f50\uff09\uff0c\u8981\u4e48\u6253\u6563\u76f8\u5e72\u6027\uff08\u6269\u6563\u5904\u7406\u30013:1 \u9ea6\u514b\u98ce\u6cd5\u5219\uff09\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ed3\u8bed\uff1a\u770b\u4e0d\u89c1\u7684\u5e72\u6d89\uff0c\u542c\u5f97\u89c1\u7684\u7834\u574f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u68b3\u72b6\u6ee4\u6ce2\u6548\u5e94\u6700&#8221;\u72e1\u733e&#8221;\u7684\u5730\u65b9\u5728\u4e8e\uff0c\u5b83\u4ece\u4e0d\u4f1a\u50cf\u9a7b\u6ce2\u90a3\u6837\u8ba9\u4f60\u611f\u89c9&#8221;\u8f70\u5934&#8221;\uff0c\u4e5f\u4e0d\u4f1a\u50cf\u5931\u771f\u90a3\u6837\u8ba9\u4f60\u611f\u89c9&#8221;\u523a\u8033&#8221;\u2014\u2014\u5b83\u6084\u65e0\u58f0\u606f\u5730\u628a\u9891\u54cd\u66f2\u7ebf\u524a\u51fa\u4e00\u6392\u4f60\u8089\u773c\u5728\u542c\u611f\u4e0a\u5f88\u96be\u76f4\u63a5\u5f52\u56e0\u7684\u51f9\u9677\uff0c\u7ed3\u679c\u5c31\u662f&#8221;\u83ab\u540d\u5176\u5999&#8221;\u7684\u53d1\u95f7\u3001\u53d1\u865a\u3001\u5b9a\u4f4d\u6a21\u7cca\u3002\u7406\u89e3\u5b83\u7684\u7269\u7406\u672c\u8d28\u4e4b\u540e\uff0c\u4f60\u4f1a\u53d1\u73b0\u5bb6\u5ead\u5f71\u9662\u3001\u4e13\u4e1a\u97f3\u54cd\u3001\u5f55\u97f3\u68da\u91cc\u7684\u5f88\u591a\u6446\u4f4d\u89c4\u8303\u548c\u6ee4\u6ce2\u5668\u8bbe\u8ba1\u89c4\u5219\uff0c\u80cc\u540e\u90fd\u662f\u5728\u8ddf\u8fd9\u540c\u4e00\u4e2a\u7269\u7406\u73b0\u8c61\u6253\u4ea4\u9053\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u672c\u6587\u4f5c\u8005\uff1a<\/strong> \u5f20\u4e4b\u5f6c\uff0c\u6210\u90fd\u5b8f\u5a01\u89c6\u542c\u79d1\u6280\u6709\u9650\u516c\u53f8\u6280\u672f\u603b\u76d1\uff0cTHX \/ CEDIA \/ HAA \/\u6e05\u534e\u58f0\u5b66\u56db\u91cd\u56fd\u9645\u8ba4\u8bc1\uff0c\u6df1\u8015\u897f\u5357\u97f3\u89c6\u9891\u884c\u4e1a\u8fd120\u5e74\u3002<br>\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a<strong>\u5f6c\u54e5\u61c2\u97f3\u54cd<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u270d\ufe0f \u5f20\u4e4b\u5f6c \u00b7 \u6280\u672f\u603b\u76d1\u3000\ud83c\udfe2 \u6210\u90fd\u5b8f\u5a01 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