{"id":74425,"date":"2023-12-30T22:15:26","date_gmt":"2023-12-30T14:15:26","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=74425"},"modified":"2023-12-30T22:15:26","modified_gmt":"2023-12-30T14:15:26","slug":"zyhscd","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/74425.html","title":{"rendered":"\u589e\u76ca\u6362\u7b97\u6210db"},"content":{"rendered":"

  \u4eca\u5929\u6211\u4eec\u5c06\u4ecb\u7ecd\u589e\u76ca\u6362\u7b97\u6210db\u7684\u6982\u5ff5\uff0c\u63a2\u8ba8\u5176\u5728\u79d1\u5b66\u548c\u5de5\u7a0b\u9886\u57df\u4e2d\u7684\u91cd\u8981\u6027\uff0c\u5e76\u89e3\u91ca\u5982\u4f55\u8fdb\u884c\u589e\u76ca\u7684db\u6362\u7b97\u3002<\/p>\n

\u589e\u76ca\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

  \u5728\u7535\u5b50\u8bbe\u5907\u548c\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u589e\u76ca\u662f\u6307\u4fe1\u53f7\u8f93\u51fa\u4e0e\u8f93\u5165\u4e4b\u95f4\u7684\u6bd4\u7387\u3002\u589e\u76ca\u6362\u7b97\u6210db\u662f\u4e00\u79cd\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u7528\u6765\u8868\u793a\u589e\u76ca\u7684\u5927\u5c0f\u3002db\uff08\u5206\u8d1d\uff09\u662f\u4e00\u79cd\u5bf9\u6570\u5355\u4f4d\uff0c\u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u8868\u8fbe\u975e\u5e38\u5927\u6216\u8005\u975e\u5e38\u5c0f\u7684\u503c\u3002\u4ee5\u5341\u500d\u5bf9\u6570\u4e3a\u57fa\u7840\uff0c\u4f7f\u7528db\u5355\u4f4d\u53ef\u4ee5\u65b9\u4fbf\u5730\u6bd4\u8f83\u4e0d\u540c\u7cfb\u7edf\u7684\u589e\u76ca\u5927\u5c0f\u3002<\/p>\n

  \u5982\u4f55\u8ba1\u7b97\u589e\u76ca\u7684db\u503c<\/h3>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u7684\u516c\u5f0f\u4e3a\uff1a<\/p>\n

   [ G_{db} = 10log_{10}(G) ]<\/p>\n

   \u5176\u4e2d\uff0c( G ) \u4e3a\u589e\u76ca\u503c\uff0c( G_{db} ) \u4e3a\u4ee5db\u8868\u793a\u7684\u589e\u76ca\u503c\u3002<\/p>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u7684\u5e94\u7528<\/h3>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u5728\u5c04\u9891\u7cfb\u7edf\u3001\u97f3\u9891\u8bbe\u5907\u3001\u65e0\u7ebf\u901a\u4fe1\u4ee5\u53ca\u5404\u79cd\u4f20\u611f\u5668\u7b49\u9886\u57df\u5e7f\u6cdb\u5e94\u7528\u3002\u5b83\u4f7f\u5f97\u5de5\u7a0b\u5e08\u548c\u79d1\u5b66\u5bb6\u80fd\u591f\u66f4\u6709\u6548\u5730\u7406\u89e3\u548c\u6bd4\u8f83\u4e0d\u540c\u7cfb\u7edf\u7684\u589e\u76ca\u7279\u6027\uff0c\u4ece\u800c\u8fdb\u884c\u66f4\u7cbe\u786e\u7684\u8bbe\u8ba1\u548c\u4f18\u5316\u3002<\/p>\n

\u589e\u76ca\u6362\u7b97\u6210db\u7684\u91cd\u8981\u6027<\/h2>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u5177\u6709\u91cd\u8981\u7684\u5b9e\u9645\u610f\u4e49\u3002\u5728\u73b0\u4ee3\u79d1\u6280\u9886\u57df\uff0c\u5f88\u591a\u4fe1\u53f7\u7684\u5927\u5c0f\u5dee\u5f02\u975e\u5e38\u5927\uff0c\u4f7f\u7528db\u5355\u4f4d\u53ef\u4ee5\u4f7f\u5f97\u8fd9\u4e9b\u4fe1\u53f7\u7684\u6bd4\u8f83\u66f4\u52a0\u76f4\u89c2\u548c\u65b9\u4fbf\u3002\u6b64\u5916\uff0cdb\u5355\u4f4d\u4e5f\u65b9\u4fbf\u4e86\u4e0d\u540c\u7cfb\u7edf\u4e4b\u95f4\u7684\u6807\u51c6\u5316\u548c\u901a\u7528\u6027\uff0c\u4f7f\u5f97\u5de5\u7a0b\u5e08\u548c\u79d1\u5b66\u5bb6\u80fd\u591f\u66f4\u5bb9\u6613\u5730\u8fdb\u884c\u4ea4\u6d41\u4e0e\u5408\u4f5c\u3002<\/p>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u5728\u97f3\u9891\u8bbe\u5907\u4e2d\u7684\u5e94\u7528<\/h3>\n

  \u5728\u97f3\u9891\u9886\u57df\uff0c\u589e\u76ca\u6362\u7b97\u6210db\u5e38\u7528\u4e8e\u8861\u91cf\u97f3\u9891\u8bbe\u5907\u7684\u653e\u5927\u80fd\u529b\u3002\u901a\u8fc7\u6bd4\u8f83\u4e0d\u540c\u8bbe\u5907\u7684\u589e\u76ca\u503c\uff0c\u4eba\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u9009\u62e9\u5408\u9002\u7684\u97f3\u9891\u8bbe\u5907\uff0c\u5e76\u4e14\u66f4\u597d\u5730\u7406\u89e3\u97f3\u9891\u7cfb\u7edf\u7684\u6027\u80fd\u8868\u73b0\u3002<\/p>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u5728\u65e0\u7ebf\u901a\u4fe1\u4e2d\u7684\u91cd\u8981\u6027<\/h3>\n

  \u5728\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\uff0c\u589e\u76ca\u6362\u7b97\u6210db\u53ef\u4ee5\u5e2e\u52a9\u5de5\u7a0b\u5e08\u66f4\u597d\u5730\u5206\u6790\u65e0\u7ebf\u4fe1\u53f7\u7684\u589e\u76ca\u7279\u6027\uff0c\u4ece\u800c\u4f18\u5316\u4fe1\u53f7\u4f20\u8f93\u7684\u6027\u80fd\u3002\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u7684\u589e\u76ca\u6362\u7b97\u6210db\u4e5f\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8bc4\u4f30\u4fe1\u53f7\u7684\u4f20\u8f93\u635f\u8017\uff0c\u4e3a\u4fe1\u53f7\u7684\u6709\u6548\u4f20\u8f93\u63d0\u4f9b\u91cd\u8981\u53c2\u8003\u3002<\/p>\n

\u603b\u7ed3<\/h2>\n

  \u589e\u76ca\u6362\u7b97\u6210db\u662f\u79d1\u5b66\u548c\u5de5\u7a0b\u9886\u57df\u4e2d\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002<\/strong>\u901a\u8fc7\u5c06\u589e\u76ca\u8868\u793a\u6210db\u5355\u4f4d\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u7406\u89e3\u548c\u6bd4\u8f83\u4e0d\u540c\u7cfb\u7edf\u7684\u589e\u76ca\u7279\u6027\u3002\u8fd9\u6709\u52a9\u4e8e\u5de5\u7a0b\u5e08\u548c\u79d1\u5b66\u5bb6\u8fdb\u884c\u66f4\u7cbe\u786e\u7684\u8bbe\u8ba1\u548c\u4f18\u5316\uff0c\u4ece\u800c\u63a8\u52a8\u79d1\u6280\u9886\u57df\u7684\u53d1\u5c55\u548c\u8fdb\u6b65\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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