{"id":82685,"date":"2024-01-04T17:00:03","date_gmt":"2024-01-04T09:00:03","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=82685"},"modified":"2024-01-04T17:00:07","modified_gmt":"2024-01-04T09:00:07","slug":"txxldhbfbhsgs","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/82685.html","title":{"rendered":"\u5929\u7ebf\u6548\u7387db\u548c\u767e\u5206\u6bd4\u6362\u7b97\u516c\u5f0f"},"content":{"rendered":"\n
\u3000\u3000\u5929\u7ebf\u6548\u7387<\/strong>\u662f\u8861\u91cf\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\uff0c\u5b83\u53cd\u6620\u4e86\u5929\u7ebf\u5c06\u8f93\u5165\u529f\u7387\u8f6c\u5316\u4e3a\u8f90\u5c04\u529f\u7387\u7684\u80fd\u529b\u3002\u5728\u5929\u7ebf\u8bbe\u8ba1\u548c\u4f18\u5316\u4e2d\uff0c\u4e86\u89e3\u5929\u7ebf\u6548\u7387\u7684\u6982\u5ff5\u548c\u8ba1\u7b97\u65b9\u6cd5\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5929\u7ebf\u6548\u7387\u7684\u5b9a\u4e49\u3001\u8ba1\u7b97\u65b9\u6cd5\u4ee5\u53ca\u4e0e\u767e\u5206\u6bd4\u7684\u6362\u7b97\u516c\u5f0f\uff0c\u5e76\u63a2\u8ba8\u5929\u7ebf\u6548\u7387\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u662f\u6307\u5929\u7ebf\u5c06\u8f93\u5165\u529f\u7387\u8f6c\u5316\u4e3a\u8f90\u5c04\u529f\u7387\u7684\u6bd4\u4f8b\u3002\u5b83\u662f\u5929\u7ebf\u6027\u80fd\u7684\u4e00\u4e2a\u91cd\u8981\u6307\u6807\uff0c\u901a\u5e38\u7528dB(\u5206\u8d1d)\u6216\u767e\u5206\u6bd4\u6765\u8868\u793a\u3002\u5929\u7ebf\u6548\u7387\u8d8a\u9ad8\uff0c\u8868\u793a\u5929\u7ebf\u5c06\u66f4\u591a\u7684\u8f93\u5165\u529f\u7387\u8f6c\u5316\u4e3a\u8f90\u5c04\u529f\u7387<\/strong>\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u5929\u7ebf\u7684\u6027\u80fd\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u6d4b\u91cf\u6216\u4eff\u771f\u6765\u83b7\u5f97\u3002\u4ee5\u4e0b\u662f\u4e24\u79cd\u5e38\u7528\u7684\u8ba1\u7b97\u65b9\u6cd5\uff1a<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u53ef\u4ee5\u901a\u8fc7\u5728\u5b9e\u9a8c\u5ba4\u6216\u6d4b\u8bd5\u573a\u5730\u8fdb\u884c\u6d4b\u91cf\u6765\u83b7\u5f97\u3002\u6d4b\u91cf\u5929\u7ebf\u7684\u8f93\u5165\u529f\u7387\u548c\u8f90\u5c04\u529f\u7387\uff0c\u7136\u540e\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\u5929\u7ebf\u6548\u7387\uff1a<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387(dB)= 10 * log10(\u8f90\u5c04\u529f\u7387 \/ \u8f93\u5165\u529f\u7387)<\/strong><\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u4e5f\u53ef\u4ee5\u901a\u8fc7\u7535\u78c1\u4eff\u771f\u8f6f\u4ef6\u8fdb\u884c\u8ba1\u7b97\u3002\u5728\u4eff\u771f\u8f6f\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u5929\u7ebf\u7684\u8f93\u5165\u529f\u7387\u548c\u8f90\u5c04\u529f\u7387\uff0c\u5e76\u901a\u8fc7\u4eff\u771f\u7ed3\u679c\u83b7\u5f97\u5929\u7ebf\u6548\u7387\u7684\u6570\u503c\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u901a\u5e38\u53ef\u4ee5\u7528\u5206\u8d1d(dB)\u6216\u767e\u5206\u6bd4\u6765\u8868\u793a\u3002\u4e0b\u9762\u662f\u5929\u7ebf\u6548\u7387\u7684\u5206\u8d1d\u548c\u767e\u5206\u6bd4\u4e4b\u95f4\u7684\u6362\u7b97\u516c\u5f0f\uff1a<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387(%)= 10 ^ (\u5929\u7ebf\u6548\u7387(dB)\/ 10)<\/strong><\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387(dB)= 10 * log10(\u5929\u7ebf\u6548\u7387(%))<\/strong><\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u4f5c\u4e3a\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\uff0c\u5e7f\u6cdb\u5e94\u7528\u4e8e\u65e0\u7ebf\u901a\u4fe1\u3001\u96f7\u8fbe\u7cfb\u7edf\u3001\u536b\u661f\u901a\u4fe1\u7b49\u9886\u57df\u3002\u4ee5\u4e0b\u662f\u5929\u7ebf\u6548\u7387\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u51e0\u4e2a\u91cd\u8981\u4f5c\u7528\uff1a<\/p>\n\n\n\n \u3000\u3000\u901a\u8fc7\u8ba1\u7b97\u548c\u6bd4\u8f83\u4e0d\u540c\u5929\u7ebf\u7684\u6548\u7387\uff0c\u53ef\u4ee5\u9009\u62e9\u6700\u4f73\u7684\u5929\u7ebf\u8bbe\u8ba1\u65b9\u6848\u3002\u9ad8\u6548\u7387\u7684\u5929\u7ebf\u53ef\u4ee5\u63d0\u9ad8\u901a\u4fe1\u8ddd\u79bb\u3001\u964d\u4f4e\u529f\u8017\u548c\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u76f4\u63a5\u5f71\u54cd\u7cfb\u7edf\u7684\u4f20\u8f93\u529f\u7387\u548c\u63a5\u6536\u7075\u654f\u5ea6\u3002\u901a\u8fc7\u63d0\u9ad8\u5929\u7ebf\u6548\u7387\uff0c\u53ef\u4ee5\u63d0\u9ad8\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u7684\u4f20\u8f93\u8ddd\u79bb\u548c\u63a5\u6536\u7075\u654f\u5ea6\uff0c\u4ece\u800c\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u7684\u63d0\u9ad8\u53ef\u4ee5\u51cf\u5c11\u80fd\u6e90\u7684\u6d6a\u8d39\u3002\u5bf9\u4e8e\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u548c\u536b\u661f\u901a\u4fe1\u7cfb\u7edf\u7b49\u5927\u89c4\u6a21\u5e94\u7528\uff0c\u63d0\u9ad8\u5929\u7ebf\u6548\u7387\u53ef\u4ee5\u8282\u7ea6\u5927\u91cf\u80fd\u6e90\u548c\u6210\u672c\u3002<\/p>\n\n\n\n \u3000\u3000\u4f4e\u6548\u7387\u7684\u5929\u7ebf\u4f1a\u5bfc\u81f4\u8f83\u9ad8\u7684\u7535\u78c1\u8f90\u5c04\uff0c\u53ef\u80fd\u5bf9\u4eba\u4f53\u5065\u5eb7\u548c\u7535\u5b50\u8bbe\u5907\u4ea7\u751f\u4e0d\u5229\u5f71\u54cd\u3002\u901a\u8fc7\u63d0\u9ad8\u5929\u7ebf\u6548\u7387\uff0c\u53ef\u4ee5\u964d\u4f4e\u7535\u78c1\u8f90\u5c04\uff0c\u4fdd\u62a4\u4eba\u4f53\u5065\u5eb7\u548c\u51cf\u5c11\u7535\u78c1\u5e72\u6270\u3002<\/p>\n\n\n\n \u3000\u3000\u5929\u7ebf\u6548\u7387\u662f\u8861\u91cf\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\uff0c\u5b83\u53cd\u6620\u4e86\u5929\u7ebf\u5c06\u8f93\u5165\u529f\u7387\u8f6c\u5316\u4e3a\u8f90\u5c04\u529f\u7387\u7684\u80fd\u529b\u3002\u5929\u7ebf\u6548\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u6d4b\u91cf\u6216\u4eff\u771f\u83b7\u5f97\uff0c\u5e76\u53ef\u4ee5\u7528\u5206\u8d1d\u6216\u767e\u5206\u6bd4\u6765\u8868\u793a\u3002<\/strong>\u5929\u7ebf\u6548\u7387\u5728\u5929\u7ebf\u8bbe\u8ba1\u548c\u4f18\u5316\u3001\u7cfb\u7edf\u6027\u80fd\u63d0\u5347\u3001\u80fd\u6e90\u8282\u7ea6\u548c\u7535\u78c1\u8f90\u5c04\u63a7\u5236\u7b49\u65b9\u9762\u5177\u6709\u91cd\u8981\u5e94\u7528\u4ef7\u503c\u3002\u5728\u672a\u6765\u7684\u7814\u7a76\u548c\u5b9e\u8df5\u4e2d\uff0c\u6211\u4eec\u5e94\u8be5\u8fdb\u4e00\u6b65\u6df1\u5165\u7814\u7a76\u5929\u7ebf\u6548\u7387\u7684\u63d0\u9ad8\u65b9\u6cd5\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u65ad\u53d1\u5c55\u7684\u65e0\u7ebf\u901a\u4fe1\u548c\u96f7\u8fbe\u7cfb\u7edf\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" 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\u3000\u3000\u4e8c\u3001\u5929\u7ebf\u6548\u7387\u7684\u8ba1\u7b97\u65b9\u6cd5<\/h2>\n\n\n\n
\u3000\u30001. \u6d4b\u91cf\u6cd5\uff1a<\/h3>\n\n\n\n
\u3000\u30002. \u4eff\u771f\u6cd5\uff1a<\/h3>\n\n\n\n
\u3000\u3000\u4e09\u3001\u5929\u7ebf\u6548\u7387\u7684\u767e\u5206\u6bd4\u6362\u7b97\u516c\u5f0f<\/h2>\n\n\n\n
\u3000\u30001. dB\u8f6c\u6362\u4e3a\u767e\u5206\u6bd4\uff1a<\/h3>\n\n\n\n
\u3000\u30002. \u767e\u5206\u6bd4\u8f6c\u6362\u4e3adB\uff1a<\/h3>\n\n\n\n
\u3000\u3000\u56db\u3001\u5929\u7ebf\u6548\u7387\u7684\u5e94\u7528<\/h2>\n\n\n\n
\u3000\u30001. \u4f18\u5316\u5929\u7ebf\u8bbe\u8ba1\uff1a<\/h3>\n\n\n\n
\u3000\u30002. \u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\uff1a<\/h3>\n\n\n\n
\u3000\u30003. \u8282\u7ea6\u80fd\u6e90\uff1a<\/h3>\n\n\n\n
\u3000\u30004. \u964d\u4f4e\u7535\u78c1\u8f90\u5c04\uff1a<\/h3>\n\n\n\n
\u3000\u3000\u7ed3\u8bba\uff1a<\/h2>\n\n\n\n