{"id":120207,"date":"2026-10-31T07:25:01","date_gmt":"2026-10-30T23:25:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/120207.html"},"modified":"2026-10-31T07:25:01","modified_gmt":"2026-10-30T23:25:01","slug":"audio%e5%ad%a6%e4%b9%a01%ef%bc%88%e5%9f%ba%e7%a1%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/120207.html","title":{"rendered":"Audio\u5b66\u4e601\uff08\u57fa\u7840\uff09"},"content":{"rendered":"<h2>1 \u58f0\u5b66\u57fa\u7840\u77e5\u8bc6<\/h2>\n<p>\u6700\u5f00\u59cb\u7684\u58f0\u97f3\u4f20\u64ad\u8bde\u751f\u4e8e1876\u5e74\u7f8e\u56fd&#xff0c;\u5176\u5b9e\u5c31\u662f\u58f0\u97f3\u901a\u8fc7\u5728\u5e26\u52a8\u94c1\u7247\u9707\u52a8&#xff0c;\u7136\u540e\u5f15\u8d77\u7ecf\u8fc7\u78c1\u94c1\u4e0a\u7535\u6d41\u7684\u53d8\u5316\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"608\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232455-6ae527475bd4a.png\" width=\"1080\" \/><\/p>\n<p>\u5bf9\u4e8e\u73b0\u5728\u6d41\u884c\u7684PCM&#xff08;\u8109\u51b2\u7f16\u7801\u8c03\u5236&#xff08;Pulse Code Modulation&#xff0c;PCM&#xff09;&#xff09;&#xff0c;\u5219\u662f\u4e00\u79cd\u5c06\u6a21\u62df\u4fe1\u53f7\u8f6c\u6362\u4e3a\u6570\u5b57\u4fe1\u53f7\u7684\u7f16\u7801\u6280\u672f\u3002\u8be5\u6280\u672f\u7531\u82f1\u56fd\u5de5\u7a0b\u5e08Alec Reeves\u4e8e1937\u5e74\u63d0\u51fa\u3002<\/p>\n<p>\u8fd9\u91cc\u987a\u4fbf\u8bf4\u4e00\u4e0bPCM\u548c\u6211\u4ee5\u524d\u63a5\u89e6\u6bd4\u8f83\u591a\u7684G.711\u7684\u5173\u7cfb&#xff0c;\u603b\u7684\u6765\u8bf4\u5c31\u662f\u4e00\u79cd\u538b\u7f29&#xff0c;\u5b9e\u73b0\u4e86\u4f53\u79ef\u51cf\u534a\u3002\u5f53\u7136&#xff0c;\u73b0\u5728\u5f00\u53d1\u4e86\u8bdd\u4e0d\u5b66\u8fd9\u4e2a\u4e86&#xff0c;\u5b66Opus\u4e86\u3002<\/p>\n<p>G.711 \u662f\u4e00\u5957\u7f16\u7801\u6807\u51c6&#xff0c;\u5b83\u7684\u57fa\u7840\u8f7d\u4f53\u5c31\u662f PCM&#xff1b;G.711 \u2260 PCM&#xff0c;G.711 \u662f\u5bf9 8kHz\u300116bit \u7ebf\u6027 PCM \u505a\u538b\u7f29\u6620\u5c04\u540e\u7684\u7f16\u7801\u89c4\u8303\u3002<\/p>\n<li>PCM&#xff1a;\u662f\u539f\u59cb\u91c7\u6837\u683c\u5f0f\u3002 \u8bed\u97f3\u91c7\u96c6&#xff1a;8kHz \u91c7\u6837&#xff0c;16bit \u7ebf\u6027 PCM&#xff08;Linear PCM&#xff09;&#xff0c;\u6bcf\u4e2a\u6837\u672c\u662f\u76f4\u63a5\u8868\u793a\u5e45\u503c\u7684\u4e8c\u8fdb\u5236\u6570&#xff0c;\u8303\u56f4 -32768 ~ &#043;32767\u3002 \u7ebf\u6027 PCM \u7684\u95ee\u9898&#xff1a;\u4eba\u8033\u5bf9\u5c0f\u58f0\u66f4\u654f\u611f\u3001\u5927\u58f0\u4e0d\u654f\u611f&#xff0c;\u5747\u5300\u5206\u914d 16bit \u5f88\u6d6a\u8d39\u3002<\/li>\n<li>G.711&#xff08;ITU \u6807\u51c6&#xff0c;\u7535\u8bdd\u8bed\u97f3\u6807\u51c6&#xff09; \u89c4\u5b9a&#xff1a;\u8f93\u5165\u662f 8kHz 16bit \u7ebf\u6027 PCM&#xff0c;\u901a\u8fc7\u975e\u7ebf\u6027\u538b\u6269\u7b97\u6cd5&#xff0c;\u6620\u5c04\u6210 8bit \u7f16\u7801&#xff0c;\u6bcf\u4e2a\u6837\u672c 8bit\u3002<\/li>\n<p>\u00a0\u58f0\u97f3\u7684\u672c\u8d28&#xff1a;\u673a\u68b0\u7eb5\u6ce2\u4e0e\u4e09\u8981\u7d20<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"126\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232456-6ae527480cbfd.png\" width=\"560\" \/><\/p>\n<table>\n<tbody>\n<tr>\u7269\u7406\u91cf\u51b3\u5b9a\u542c\u611f\u5355\u4f4d\/\u793a\u4f8b<\/tr>\n<tr>\n<td>\u632f\u5e45<\/td>\n<td>\u54cd\u5ea6<\/td>\n<td>dB SPL&#xff08;0dB&#061;20\u00b5Pa&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u9891\u7387<\/td>\n<td>\u97f3\u9ad8<\/td>\n<td>Hz&#xff08;A4&#061;440Hz&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u6ce2\u5f62\/\u8c10\u6ce2<\/td>\n<td>\u97f3\u8272<\/td>\n<td>\u57fa\u9891&#043;\u6cdb\u97f3\u7ec4\u5408<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6570\u5b57\u5316&#xff1a;\u628a\u8fde\u7eed\u7684\u58f0\u6ce2\u53d8\u6210 0\/1<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"231\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232456-6ae52748208fd.png\" width=\"624\" \/><\/p>\n<\/p>\n<p>\u5173\u952e\u6982\u5ff5&#xff1a;<\/p>\n<table>\n<tr>\u6982\u5ff5\u4e00\u53e5\u8bdd\u89e3\u91ca\u4e3a\u4ec0\u4e48\u7ba1\u7406\u8005\u8981\u61c2<\/tr>\n<tbody>\n<tr>\n<td>\u91c7\u6837\u7387<\/td>\n<td>\u6bcf\u79d2\u53d6\u591a\u5c11\u4e2a\u70b9&#xff08;\u5e38\u89c1 16k\/48k&#xff09;<\/td>\n<td>\u51b3\u5b9a\u5e26\u5bbd\u4e0a\u9650&#xff08;48k\u219224kHz&#xff09;\u3001\u7b97\u529b\u3001\u5ef6\u8fdf<\/td>\n<\/tr>\n<tr>\n<td>\u4f4d\u6df1<\/td>\n<td>\u6bcf\u4e2a\u70b9\u7528\u591a\u5c11 bit \u8868\u793a&#xff08;16\/24\/32&#xff09;<\/td>\n<td>\u51b3\u5b9a\u52a8\u6001\u8303\u56f4&#xff08;\u6bcf bit \u7ea6 6dB&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>dB<\/td>\n<td>\u5bf9\u6570\u523b\u5ea6&#xff0c;&#043;6dB\u2248\u7535\u538b\u7ffb\u500d&#xff0c;&#043;10dB\u2248\u529f\u7387\u00d710<\/td>\n<td>\u6240\u6709\u6307\u6807\u90fd\u7528\u5b83&#xff0c;\u4e0d\u61c2 dB \u65e0\u6cd5\u5224\u65ad&#034;\u63d0\u5347 3dB&#034;\u503c\u4e0d\u503c<\/td>\n<\/tr>\n<tr>\n<td>SNR<\/td>\n<td>\u4fe1\u53f7\/\u566a\u58f0\u6bd4<\/td>\n<td>\u964d\u566a\u7b97\u6cd5\u7684\u6838\u5fc3 KPI<\/td>\n<\/tr>\n<tr>\n<td>THD&#043;N<\/td>\n<td>\u603b\u8c10\u6ce2\u5931\u771f&#043;\u566a\u58f0<\/td>\n<td>\u8bc4\u4f30\u97f3\u8d28\u52a3\u5316\u7684\u786c\u6307\u6807<\/td>\n<\/tr>\n<tr>\n<td>\u5ef6\u8fdf<\/td>\n<td>\u4ece\u91c7\u96c6\u5230\u8f93\u51fa\u7684\u65f6\u95f4<\/td>\n<td>ANC\/AEC\/\u901a\u8bdd\u7684\u751f\u547d\u7ebf&#xff0c;\u901a\u5e38 &lt;10ms \u624d\u81ea\u7136<\/td>\n<\/tr>\n<tr>\n<td>\u5757\u5904\u7406<\/td>\n<td>\u6512\u591f N \u4e2a\u70b9\u518d\u7b97\u4e00\u6b21<\/td>\n<td>\u5757\u8d8a\u5927\u8d8a\u7701\u7b97\u529b\u4f46\u5ef6\u8fdf\u8d8a\u5927&#xff0c;\u6838\u5fc3\u6743\u8861<\/td>\n<\/tr>\n<tr>\n<td>\u5b9a\u70b9\/\u6d6e\u70b9<\/td>\n<td>\u5b9a\u70b9(Q15)\u5feb\u7701\u7535&#xff0c;\u6d6e\u70b9\u7b80\u5355<\/td>\n<td>\u82af\u7247\u9009\u578b\u4e0e\u79fb\u690d\u6210\u672c\u7684\u5173\u952e<\/td>\n<\/tr>\n<tr>\n<td>MIPS\/\u8d1f\u8f7d<\/td>\n<td>\u7b97\u6cd5\u6bcf\u79d2\u8981\u591a\u5c11\u8fd0\u7b97<\/td>\n<td>\u51b3\u5b9a\u80fd\u4e0d\u80fd\u8dd1\u5728\u76ee\u6807\u82af\u7247\u4e0a\u3001\u8981\u4e0d\u8981\u52a0\u94b1<\/td>\n<\/tr>\n<tr>\n<td>\u81ea\u9002\u5e94\u6ee4\u6ce2<\/td>\n<td>\u6ee4\u6ce2\u5668\u53c2\u6570\u968f\u73af\u5883\u81ea\u52a8\u8c03\u6574<\/td>\n<td>AEC\/ANC\/\u964d\u566a\u7684\u516c\u5171\u5185\u6838<\/td>\n<\/tr>\n<tr>\n<td>\u6ce2\u675f\u6210\u5f62<\/td>\n<td>\u591a\u9ea6\u514b\u98ce&#034;\u805a\u7126&#034;\u67d0\u4e2a\u65b9\u5411<\/td>\n<td>\u8fdc\u573a\u8bed\u97f3\u7684\u6838\u5fc3&#xff0c;\u9ea6\u514b\u98ce\u6570\u91cf&#061;\u6210\u672c<\/td>\n<\/tr>\n<tr>\n<td>\u5fc3\u7406\u58f0\u5b66<\/td>\n<td>\u5229\u7528\u4eba\u8033\u63a9\u853d\u6548\u5e94\u7701\u6bd4\u7279\/\u7701\u7b97\u529b<\/td>\n<td>\u7f16\u7801\u5668\u3001\u964d\u566a\u7b56\u7565\u7684\u5e95\u5c42\u4f9d\u636e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6362\u80fd\u5668\u603b\u89c8&#xff1a;\u9ea6\u514b\u98ce\u4e0e\u5587\u53ed\/\u8033\u673a\u4e92\u4e3a\u955c\u50cf<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"72\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232456-6ae5274837ad6.png\" width=\"591\" \/><\/p>\n<p>\u9ea6\u514b\u98ce \u2192 ADC&#xff08;\u91c7\u6837\u7387\u3001\u4f4d\u6df1\u3001THD&#043;N\u3001SNR&#xff09;\u2192 \u5206\u5757&#xff08;\u5757\u5904\u7406&#xff0c;\u5e26\u6765\u5ef6\u8fdf&#xff09;\u2192 DSP&#xff08;\u5b9a\u70b9 \/ MIPS \u7b97\u529b\u7ea6\u675f&#xff09;\u2192 \u7b97\u6cd5&#xff1a;\u6ce2\u675f\u6210\u5f62\u62fe\u97f3 \u2192 \u81ea\u9002\u5e94\u6ee4\u6ce2&#xff08;AEC\/ANC&#xff09;\u2192 \u5fc3\u7406\u58f0\u5b66\u964d\u566a \/ \u7f16\u7801 \u2192 DAC \u8f93\u51fa<\/p>\n<\/p>\n<h2><\/h2>\n<\/p>\n<h2>2 \u5f55\u97f3\u5168\u6d41\u7a0b<\/h2>\n<p>\u00a0\u9ea6\u514b\u98ce&#xff1a;\u58f0 \u2192 \u7535<\/p>\n<p>\u76ee\u524d\u7684\u51e0\u79cd\u9ea6\u514b\u98ce&#xff1a;<\/p>\n<table>\n<tbody>\n<tr>\n<p>\u5bf9\u6bd4\u9879<\/p>\n<p>\u6a21\u62df\u9ea6\u514b\u98ce<\/p>\n<p>PDM \u6570\u5b57\u9ea6\u514b\u98ce<\/p>\n<p>I\u00b2S \u6570\u5b57\u9ea6\u514b\u98ce<\/p>\n<\/tr>\n<tr>\n<td>\n<p>\u9ea6\u514b\u98ce\u8f93\u51fa<\/p>\n<\/td>\n<td>\n<p>\u6a21\u62df\u7535\u538b\/\u7535\u6d41<\/p>\n<\/td>\n<td>\n<p>1-bit \u6bd4\u7279\u6d41<\/p>\n<\/td>\n<td>\n<p>\u591a\u4f4d PCM \u6570\u636e<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>ADC \u5728\u54ea\u91cc<\/p>\n<\/td>\n<td>\n<p>\u5916\u90e8 Codec \/ SoC \u7b49<\/p>\n<\/td>\n<td>\n<p>\u9ea6\u514b\u98ce\u5185\u90e8<\/p>\n<\/td>\n<td>\n<p>\u9ea6\u514b\u98ce\u5185\u90e8<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u662f\u5426\u9700\u8981 PDM \u89e3\u7801<\/p>\n<\/td>\n<td>\n<p>\u4e0d\u9700\u8981<\/p>\n<\/td>\n<td>\n<p>\u9700\u8981<\/p>\n<\/td>\n<td>\n<p>\u4e0d\u9700\u8981<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u5e38\u89c1\u8fde\u63a5<\/p>\n<\/td>\n<td>\n<p>\u6a21\u62df\u8f93\u5165<\/p>\n<\/td>\n<td>\n<p>DATA &#043; CLK<\/p>\n<\/td>\n<td>\n<p>BCLK &#043; WS &#043; DOUT<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>MCU \u5de5\u4f5c<\/p>\n<\/td>\n<td>\n<p>\u91c7\u6837 ADC<\/p>\n<\/td>\n<td>\n<p>PDM \u6ee4\u6ce2\u3001\u62bd\u53d6<\/p>\n<\/td>\n<td>\n<p>\u63a5\u6536 I\u00b2S DMA \u6570\u636e<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u76ee\u524d\u7528\u7684\u6700\u591a\u7684\u57fa\u672c\u4e0a\u5c31\u662f\u6570\u5b57\u9ea6\u514b\u98ce&#xff0c;\u5168\u6d41\u7a0b\u5982\u4e0b&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"941\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232456-6ae527484a9bc.png\" width=\"1672\" \/><\/p>\n<p>\u6570\u5b57\u9ea6\u514b\u98ce\u5168\u6d41\u7a0b&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"1011\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232457-6ae52749c38a0.png\" width=\"2289\" \/><\/p>\n<p>PDM&#xff08;Pulse Density Modulation&#xff0c;\u8109\u51b2\u5bc6\u5ea6\u8c03\u5236&#xff09;<\/p>\n<p>PDM \u662f\u5355\u6bd4\u7279\u7684\u97f3\u9891\u8c03\u5236\u683c\u5f0f&#xff0c;\u5e7f\u6cdb\u7528\u4e8e MEMS \u6570\u5b57\u9ea6\u514b\u98ce\u3002\u5b83\u53ea\u7528 0 \u548c 1 \u4e24\u79cd\u7535\u5e73&#xff0c;\u4e0d\u9760\u5e45\u503c\u3001\u800c\u662f\u4f9d\u9760\u8109\u51b2\u7684\u758f\u5bc6\u5bc6\u5ea6\u6765\u8868\u5f81\u58f0\u97f3\u4fe1\u53f7\u5927\u5c0f&#xff1a;\u4fe1\u53f7\u5e45\u503c\u8d8a\u5927&#xff0c;\u9ad8\u8109\u51b2\u5360\u6bd4\u8d8a\u9ad8\u3002\u53ea\u9700\u8981\u4e24\u6839\u7ebf&#xff08;\u65f6\u949f &#043; \u6570\u636e&#xff09;\u4f20\u8f93&#xff0c;\u7535\u8def\u7b80\u5355\u3001\u6297\u5e72\u6270\u5f3a&#xff1b;\u7f3a\u70b9\u662f\u539f\u59cb PDM \u4e0d\u80fd\u76f4\u63a5\u7ed9\u97f3\u9891 DSP \u7b97\u6cd5\u4f7f\u7528&#xff0c;\u5fc5\u987b\u7ecf\u8fc7\u62bd\u53d6\u6ee4\u6ce2&#xff08;Decimation&#xff09;&#xff0c;\u964d\u91c7\u6837\u3001\u591a bit \u91cf\u5316\u540e\u8f6c\u6362\u6210 PCM\u3002<\/p>\n<p>PCM&#xff08;Pulse Code Modulation&#xff0c;\u8109\u51b2\u7f16\u7801\u8c03\u5236&#xff09;<\/p>\n<p>PCM \u662f\u6211\u4eec DSP \u7b97\u6cd5\u91cc\u6700\u5e38\u7528\u7684\u6807\u51c6\u6570\u5b57\u97f3\u9891\u683c\u5f0f&#xff0c;ADC \u6216\u8005 PDM \u89e3\u7801\u5668\u8f93\u51fa\u540e\u7684\u6807\u51c6\u5f62\u5f0f\u3002\u5b83\u6309\u56fa\u5b9a\u91c7\u6837\u7387\u5468\u671f\u6027\u91c7\u6837&#xff0c;\u6bcf\u4e2a\u91c7\u6837\u70b9\u7528\u591a\u4f4d\u4e8c\u8fdb\u5236&#xff08;16bit\/24bit \u7b49&#xff09;\u7f16\u7801\u8868\u793a\u4fe1\u53f7\u5e45\u503c&#xff0c;\u662f\u89c4\u6574\u7684\u591a\u6bd4\u7279\u91c7\u6837\u5e8f\u5217\u3002AEC\u3001ANC\u3001\u6ce2\u675f\u6210\u5f62\u3001\u6ee4\u6ce2\u7b49\u6240\u6709\u97f3\u9891\u7b97\u6cd5&#xff0c;\u90fd\u662f\u76f4\u63a5\u5bf9 PCM \u6570\u636e\u6d41\u505a\u8fd0\u7b97&#xff0c;\u4e5f\u662f\u97f3\u9891\u7f16\u89e3\u7801\u3001I2S \u603b\u7ebf\u4f20\u8f93\u7684\u4e3b\u6d41\u4fe1\u53f7\u683c\u5f0f\u3002<\/p>\n<p>\u6a21\u62df\u4fe1\u53f7\u5230PDM\u7684\u8f6c\u6362&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"579\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232458-6ae5274ac4881.png\" width=\"421\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"292\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232458-6ae5274adf339.png\" width=\"902\" \/><\/p>\n<p>PDM\u5230PCM\u7684\u8f6c\u6362&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"138\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232459-6ae5274b0c6f5.png\" width=\"482\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"303\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232459-6ae5274b209ab.png\" width=\"600\" \/><\/p>\n<p>\u5bf9\u4e8e\u6211\u4eec\u7528\u7684\u6700\u591a\u7684\u6709\u7ebf\u8033\u673a&#xff0c;\u5176\u5b9e\u662f\u6a21\u62df\u9ea6\u514b\u98ce\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"165\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261030232459-6ae5274b37d39.png\" width=\"374\" \/><\/p>\n<p>\u6b64\u65f6ADC\u901a\u5e38\u5728\u624b\u673a\u3001\u7535\u8111\u6216USB\u97f3\u9891\u8bbe\u5907\u91cc&#xff0c;\u800c\u4e0d\u662f\u4f20\u7edf\u8033\u673a\u7684\u9ea6\u514b\u98ce\u91cc\u3002<\/p>\n<p>\u4ece\u5206\u5de5\u6765\u8bf4&#xff0c;\u7b97\u6cd5\u5de5\u7a0b\u5e08\u901a\u5e38\u4ece PCM \u5f00\u59cb&#xff1b;\u5d4c\u5165\u5f0f\u97f3\u9891\u5de5\u7a0b\u5e08\u8981\u80fd\u8ffd\u6eaf\u5230 PDM\u3001I\u00b2S\u3001DMA \u548c Codec&#xff1b;\u786c\u4ef6\u4e0e\u82af\u7247\u5de5\u7a0b\u5e08\u624d\u4f1a\u7ecf\u5e38\u6df1\u5165\u5230\u6a21\u62df\u524d\u7aef\u548c \u03a3-\u0394 \u7535\u8def\u5185\u90e8\u3002\u6574\u4e2a\u6b65\u9aa4\u4e86\u89e3\u5c31\u884c&#xff0c;\u56e0\u4e3a\u4e00\u822c\u5904\u7406\u90fd\u662f\u9488\u5bf9\u6700\u540e\u7684PCM\u3002<\/p>\n<\/p>\n<h2>\u00a03 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\u53cc\u7f13\u51b2\u3001\u5757\u5927\u5c0f\u4e0e\u5ef6\u8fdf\u6743\u8861<\/li>\n<li>\u97f3\u9891\u57fa\u7840&#xff1a;\u91c7\u6837\u7387\u8f6c\u6362\u3001\u6296\u52a8\u3001\u524a\u6ce2\u3001\u7b49\u54cd\u5ea6\u3001\u5fc3\u7406\u58f0\u5b66\u63a9\u853d<\/li>\n<li>ANC &#xff1a; Active Noise Cancellation&#xff0c;\u4e3b\u52a8\u964d\u566a<\/li>\n<p>\u53ef\u4ee5\u73a9\u7684\u4e00\u4e9b\u5c0f\u7ec3\u4e60\u3002<\/p>\n<table>\n<tr>\u5185\u5bb9\u4f5c\u54c1&#xff08;GitHub &#043; README \u6307\u6807&#xff09;<\/tr>\n<tbody>\n<tr>\n<td style=\"width:258px\">\u91c7\u6837\/\u91cf\u5316\/DFT\u3001FIR\/IIR \u8bbe\u8ba1\u3001\u5b9a\u70b9\u8fd0\u7b97&#xff08;Q \u683c\u5f0f\u3001\u9971\u548c\u820d\u5165&#xff09;<\/td>\n<td style=\"width:430px\">C \u8bed\u8a00\u5b9e\u73b0 biquad\/FFT&#xff0c;\u4e0e scipy \u7ed3\u679c\u5bf9\u6bd4\u8bef\u5dee &lt;1e-3<\/td>\n<\/tr>\n<tr>\n<td style=\"width:258px\">\u5b9e\u65f6\u97f3\u9891\u6846\u67b6&#xff1a;ALSA\/\u5757\u5904\u7406\/\u73af\u5f62\u7f13\u51b2\/\u5ef6\u8fdf\u6d4b\u91cf<\/td>\n<td style=\"width:430px\">Pi \u4e0a C \u8bed\u8a00\u5b9e\u65f6 EQ&#043;DRC \u94fe\u8def&#xff0c;\u62a5\u544a CPU% \u4e0e\u7aef\u5230\u7aef\u5ef6\u8fdf<\/td>\n<\/tr>\n<tr>\n<td style=\"width:258px\">\u81ea\u9002\u5e94\u6ee4\u6ce2&#xff1a;NLMS\/LMS \u63a8\u5bfc&#043;\u5b9e\u73b0\u3001AEC \u7ed3\u6784<\/td>\n<td style=\"width:430px\">\u56de\u58f0\u6d88\u9664 demo&#xff1a;Pi \u653e\u97f3\u4e50\u540c\u65f6\u5f55\u4eba\u58f0&#xff0c;ERLE \u6307\u6807 &gt;15dB<\/td>\n<\/tr>\n<tr>\n<td style=\"width:258px\">\u9ea6\u514b\u98ce\u9635\u5217&#xff1a;\u5ef6\u8fdf\u6c42\u548c\/MVDR\u3001\u540e\u6ee4\u6ce2\u964d\u566a<\/td>\n<td style=\"width:430px\">\u53cc\u9ea6\u6ce2\u675f\u6210\u5f62&#xff1a;\u6d4b SNR \u63d0\u5347 &#043; 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