{"id":2966,"date":"2020-03-13T06:57:12","date_gmt":"2020-03-13T06:57:12","guid":{"rendered":""},"modified":"2020-03-13T14:57:39","modified_gmt":"2020-03-13T06:57:39","slug":"%e4%bc%a0%e6%84%9f%e5%99%a8%e7%9a%84%e9%9d%99%e6%80%81%e7%89%b9%e6%80%a7%e4%b8%8e%e5%8a%a8%e6%80%81%e7%89%b9%e6%80%a7%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.szryc.com\/?p=2966","title":{"rendered":"\u4f20\u611f\u5668\u7684\u9759\u6001\u7279\u6027\u4e0e\u52a8\u6001\u7279\u6027\u89e3\u6790"},"content":{"rendered":"

\n\t\u4f20\u611f\u5668<\/u>\u7684\u9759\u6001\u7279\u6027<\/p>\n

\n\t\u4f20\u611f\u5668\u7684\u9759\u6001\u7279\u6027\u662f\u6307\u5bf9\u9759\u6001\u7684\u8f93\u5165\u4fe1\u53f7\uff0c\u4f20\u611f\u5668\u7684\u8f93\u51fa\u91cf\u4e0e\u8f93\u5165\u91cf\u4e4b\u95f4\u6240\u5177\u6709\u76f8\u4e92\u5173\u7cfb\u3002\u56e0\u4e3a\u8fd9\u65f6\u8f93\u5165\u91cf\u548c\u8f93\u51fa\u91cf\u90fd\u548c\u65f6\u95f4\u65e0\u5173\uff0c\u6240\u4ee5\u5b83\u4eec\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5373\u4f20\u611f\u5668\u7684\u9759\u6001\u7279\u6027\u53ef\u7528\u4e00\u4e2a\u4e0d\u542b\u65f6\u95f4\u53d8\u91cf\u7684\u4ee3\u6570\u65b9\u7a0b\uff0c\u6216\u4ee5\u8f93\u5165\u91cf\u4f5c\u6a2a\u5750\u6807\uff0c\u628a\u4e0e\u5176\u5bf9\u5e94\u7684\u8f93\u51fa\u91cf\u4f5c\u7eb5\u5750\u6807\u800c\u753b\u51fa\u7684\u7279\u6027\u66f2\u7ebf\u6765\u63cf\u8ff0\u3002\u8868\u5f81\u4f20\u611f\u5668\u9759\u6001\u7279\u6027\u7684\u4e3b\u8981\u53c2\u6570\u6709\uff1a\u7ebf\u6027\u5ea6\u3001\u7075\u654f\u5ea6\u3001\u5206\u8fa8\u529b\u548c\u8fdf\u6ede\u7b49\u3002<\/p>\n

\n\t <\/div>\n

\n\t\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027<\/p>\n

\n\t\u6240\u8c13\u52a8\u6001\u7279\u6027\uff0c\u662f\u6307\u4f20\u611f\u5668\u5728\u8f93\u5165\u53d8\u5316\u65f6\uff0c\u5b83\u7684\u8f93\u51fa\u7684\u7279\u6027\u3002\u5728\u5b9e\u9645\u5de5\u4f5c\u4e2d\uff0c\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027\u5e38\u7528\u5b83\u5bf9\u67d0\u4e9b\u6807\u51c6\u8f93\u5165\u4fe1\u53f7\u7684\u54cd\u5e94\u6765\u8868\u793a\u3002\u8fd9\u662f\u56e0\u4e3a\u4f20\u611f\u5668\u5bf9\u6807\u51c6\u8f93\u5165\u4fe1\u53f7\u7684\u54cd\u5e94\u5bb9\u6613\u7528\u5b9e\u9a8c\u65b9\u6cd5\u6c42\u5f97\uff0c\u5e76\u4e14\u5b83\u5bf9\u6807\u51c6\u8f93\u5165\u4fe1\u53f7\u7684\u54cd\u5e94\u4e0e\u5b83\u5bf9\u4efb\u610f\u8f93\u5165\u4fe1\u53f7\u7684\u54cd\u5e94\u4e4b\u95f4\u5b58\u5728\u4e00\u5b9a\u7684\u5173\u7cfb\uff0c\u5f80\u5f80\u77e5\u9053\u4e86\u524d\u8005\u5c31\u80fd\u63a8\u5b9a\u540e\u8005\u3002\u6700\u5e38\u7528\u7684\u6807\u51c6\u8f93\u5165\u4fe1\u53f7\u6709\u9636\u8dc3\u4fe1\u53f7\u548c\u6b63\u5f26\u4fe1\u53f7\u4e24\u79cd\uff0c\u6240\u4ee5\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027\u4e5f\u5e38\u7528\u9636\u8dc3\u54cd\u5e94\u548c\u9891\u7387\u54cd\u5e94\u6765\u8868\u793a\u3002<\/p>\n

\n\t\"\u4f20\u611f\u5668\u7684\u9759\u6001\u7279\u6027\u4e0e\u52a8\u6001\u7279\u6027\u89e3\u6790\"<\/p>\n

\n\tdB\uff08Decibel\uff0c\u5206\u8d1d\uff09 \u662f\u4e00\u4e2a\u7eaf\u8ba1\u6570\u5355\u4f4d\uff0c\u672c\u610f\u662f\u8868\u793a\u4e24\u4e2a\u91cf\u7684\u6bd4\u503c\u5927\u5c0f\uff0c\u6ca1\u6709\u5355\u4f4d<\/p>\n

\n\t\u5bf9\u4e8e\u529f\u7387\uff0cdB = 10*lg\uff08A\/B\uff09\u3002\u5bf9\u4e8e\u7535\u538b\u6216\u7535\u6d41<\/u>\uff0cdB = 20*lg\uff08A\/B\uff09\u3002<\/p>\n

\n\t-3=10*lg\uff08x\uff09<\/p>\n

\n\tx=0.5 \uff088-20Hz\uff09<\/p>\n

\n\t\u5239\u90a3\u662f\u6307\u4e00\u4e2a\u5fc3\u5ff5\u8d77\u52a8\u7684\u6781\u77ed\u65f6\u95f4\u5373\u4e3a\u4e00“\u5ff5”\uff0c20\u5ff5\u4e3a\u4e00\u77ac\uff0c20\u77ac\u4e3a\u4e00\u5f39\u6307\uff0c20\u5f39\u6307\u4e3a\u4e00\u7f57\u9884\uff0c20\u7f57\u9884\u4e3a\u4e00\u987b\u81fe\uff0c30\u987b\u81fe\u4e3a\u4e00\u663c\u591c\uff0c\u5982\u6b64\u7b97\u6765\uff0c\u4e00\u5239\u90a3\u5c31\u662f0.018\u79d2\u3002<\/p>\n

\n\t\u5728\u5bf9\u70ae\u53e3\u51b2\u51fb\u6ce2\u6d4b\u8bd5<\/u>\u4e2d\uff0c\u538b\u529b\u4f20\u611f\u5668<\/u>\u7684\u52a8\u6001\u6027\u80fd\u6307\u6807\u662f\u5426\u6ee1\u8db3\u6d4b\u91cf<\/u>\u8981\u6c42\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u901a\u8fc7GLS\uff08SF\uff09\u65b9\u6cd5\u5efa\u7acb\u538b\u529b\u4f20\u611f\u5668<\/u>\u7684\u6570\u5b66\u6a21\u578b\uff0c\u5e76\u7531\u6570\u5b66\u6a21\u578b\u6c42\u51fa\u52a8\u6001\u6027\u80fd\u6307\u6807\u3002\u7136\u800c\u8be5\u4f20\u611f\u5668\u7684\u52a8\u6001\u6027\u80fd\u6307\u6807\u4e0d\u80fd\u6ee1\u8db3\u6d4b\u91cf\u8981\u6c42\uff0c\u9488\u5bf9\u6b64\u95ee\u9898\u672c\u6587\u91c7\u7528\u96f6\u6781\u70b9\u76f8\u6d88\u7684\u65b9\u6cd5\u8bbe\u8ba1\u51fa\u52a8\u6001\u8865\u507f\u6ee4\u6ce2\u5668<\/u>\uff0c\u660e\u663e\u63d0\u9ad8\u4e86\u8be5\u4f20\u611f\u5668\u7684\u52a8\u6001\u6027\u80fd\uff0c\u6700\u7ec8\u89e3\u51b3\u4e86\u8be5\u51b2\u51fb\u6ce2\u7684\u6d4b\u91cf\u95ee\u9898\u3002<\/p>\n

\n\t1 \u5f15\u8a00<\/p>\n

\n\t\u5728\u70ae\u53e3\u51b2\u51fb\u6ce2\u6d4b\u8bd5\u7cfb\u7edf\u4e2d\uff0c \u9700\u8981\u5bf9\u51b2\u51fb\u6ce2\u9ad8\u538b\u4fe1\u53f7\u8fdb\u884c\u52a8\u6001\u6d4b\u91cf\u3002<\/p>\n

\n\t\u7531\u4e8e\u70ae\u53e3\u51b2\u51fb\u6ce2\u662f\u4e00\u79cd\u9ad8\u901f\u538b\u529b\u6ce2\uff0c\u4fe1\u53f7\u7684\u9891\u5e26\u5f88\u5bbd\uff08\u6709\u6548\u5e26\u5bbd\u7ea6\u4e3a70KHZ\uff09\uff0c\u4fe1\u53f7\u4e0a\u5347\u4e00\u822c\u5728\u6570ua\u5185\uff0c\u4e14\u6301\u7eed\u65f6\u95f4\u77ed\uff0c\u6240\u4ee5\u8981\u6c42\u538b\u529b\u4f20\u611f\u5668\u7684\u5de5\u4f5c\u9891\u5e26\u5bbd\u3001\u54cd\u5e94\u65f6\u95f4\u5feb\u3002\u53ef\u4ee5\u8bf4\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027\u5c06\u76f4\u63a5\u5f71\u54cd\u6d4b\u8bd5\u7cfb\u7edf\u529f\u80fd\u7684\u53d1\u6325\u3002<\/p>\n

\n\t\u9996\u5148\u9700\u8981\u5bf9\u8be5\u4f20\u611f\u5668\u52a8\u6001\u7279\u6027\u8fdb\u884c\u7814\u7a76\uff0c\u5982\u679c\u5176\u5de5\u4f5c\u9891\u5e26\u4e0d\u80fd\u6db5\u76d6\u88ab\u6d4b\u91cf\u4fe1\u53f7\u7684\u6709\u6548\u5e26\u5bbd\uff0c\u8f93\u51fa\u4fe1\u53f7\u4e0e\u88ab\u6d4b\u4fe1\u53f7\u4e4b\u95f4\u5b58\u5728\u7578\u53d8\uff0c\u6d4b\u91cf\u7ed3\u679c\u5c31\u4e0d\u53ef\u4fe1\u3002\u8fd9\u65f6\u5c31\u9700\u8981\u8fdb\u884c\u52a8\u6001\u8865\u507f\u4ee5\u51cf\u5c0f\u52a8\u6001\u8bef\u5dee\u3002<\/p>\n

\n\t\u4e3a\u4e86\u83b7\u53d6\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027\uff0c\u5fc5\u987b\u4ece\u5b83\u7684\u52a8\u6001\u6a21\u578b\u4eba\u624b\uff0c\u901a\u8fc7\u52a8\u6001\u6821\u51c6\u5b9e\u9a8c\u6570\u636e\uff0c\u7528\u7cfb\u7edf\u8fa8\u8bc6\u7684\u65b9\u6cd5\u83b7\u5f97\u4f20\u611f\u5668\u7684\u52a8\u6001\u6570\u5b66\u6a21\u578b\uff0c\u5e76\u7531\u6b64\u6c42\u51fa\u52a8\u6001\u6027\u80fd\u6307\u6807\u3002<\/p>\n

\n\t\u5982\u679c\u52a8\u6001\u6027\u80fd\u6307\u6807\u4e0d\u80fd\u6ee1\u8db3\u6d4b\u91cf\u8981\u6c42\uff0c\u5c31\u5e94\u8be5\u8bbe\u8ba1\u52a8\u6001\u8865\u507f\u6ee4\u6ce2\u5668\uff0c\u6539\u5584\u4f20\u611f\u5668\u7684\u52a8\u6001\u6027\u80fd\uff0c\u63d0\u9ad8\u6574\u4e2a\u6d4b\u8bd5\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u51c6\u786e\u6027\u3002<\/p>\n

\n\t2 \u4f20\u611f\u5668\u5efa\u6a21\u65b9\u6cd5\u3001\u6b65\u9aa4\u53ca\u5176\u7ed3\u679c<\/p>\n

\n\t\u5bf9\u4e8e\u538b\u529b\u4f20\u611f\u5668\u5efa\u6a21\uff0c\u4ece\u7cfb\u7edf\u8fa8\u8bc6\u7406\u8bba\u53ef\u77e5\uff0c\u4e3a\u4e86\u8fa8\u8bc6\u7cfb\u7edf\uff0c\u5fc5\u987b\u5bf9\u7cfb\u7edf\u52a0\u4eba\u8db3\u591f“\u4e30\u5bcc”\u7684\u6fc0\u52b1\u4fe1\u53f7\uff08\u5145\u5206\u8986\u76d6\u88ab\u6821\u4f20\u611f\u5668\u7684\u6a21\u6001\uff09\uff0c\u6fc0\u52b1\u51fa\u4f20\u611f\u5668\u7684\u4e3b\u8981\u6a21\u6001Δ\u5168\u9762\u83b7\u53d6\u4f20\u611f\u5668\u7684\u6709\u7528\u4fe1\u606f\uff0c\u636e\u6b64\u5efa\u7acb\u76f8\u5e94\u7684\u8f93\u4eba\u8f93\u51fa\u5173\u7cfb\u3002<\/p>\n

\n\t\u57fa\u4e8e\u9884\u6d4b\u7684\u6ee4\u6ce2\u7b97\u6cd5<\/p>\n

\n\t1\u3001\u91c7\u96c610\u4e2a\u6570\u636e\u3002<\/p>\n

\n\t2\u3001\u5f53\u91c7\u96c6\u5230\u7b2c11\u4e2a\u6570\u636e\u65f6\uff0c\u901a\u8fc7\u524d\u976210\u4e2a\u6570\u636e\u8fdb\u884c\u66f2\u7ebf\u62df\u5408\u5982\u679c\u6570\u636e\u65f6\u5728\u52a8\u6001\u8303\u56f4\u5185\uff0c\u6b64\u6570\u636e\u6709\u6548\u3002\u5426\u5219\u6570\u636e\u901a\u8fc7\uff0c\u62df\u5408\u540e\uff0c\u6b64\u6570\u636e\u548c\u91c7\u96c6\u7684\u6570\u636e\u8fdb\u884c\u52a0\u6743\u5904\u7406\u3002<\/p>\n

\n\t\u5982\u679c\u8d85\u8fc7\u52a8\u6001\u503c\uff0c\u6b64\u6570\u636e\u4e3a\u5047\u6570\u636e\u3002<\/p>\n

\n\t3\u3001\u662f\u6b63\u5e38\u6270\u52a8\u9020\u6210\u7684\u6570\u636e\u5982\u4f55\u5904\u7406\uff1a\u4fe1\u53f7\u4e3a\u9636\u8dc3\u4fe1\u53f7\u5219\u6301\u7eed\u589e\u5927\u6216\u6301\u7eed\u51cf\u5c0f\uff0c\u5982\u679c\u4e3a\u5468\u671f\u6027\u4fe1\u53f7\uff0c\u5219\u6b64\u6570\u636e\u53c8\u662f\u3002<\/p>\n

\n\t\u5047\u8bbe\uff1a\u7cfb\u7edf\u4e3a\u4e00\u9636\u5bf9\u8c61\u6216\u662f\u4e8c\u9636\u5bf9\u8c61\u3002<\/p>\n

\n\t4\u3001\u662f\u5e72\u6270\u4fe1\u53f7\uff1a\u9891\u7387\u8d85\u8fc7\u67d0\u4e2a\u9891\u7387\uff0c\u67d0\u4e2a\u9891\u738750H\uff0c\u51b2\u51fb\u5e72\u6270\u3002<\/p>\n

\n\t5\u300110\u4e2a\u6570\u636e\u53ef\u4ee5\u5206\u6790\u6570\u636e\u7684\u9891\u8c31\u3002<\/p>\n

\n\t\u4f20\u611f\u5668\u7684\u9759\u6001\u7279\u6027<\/p>\n

\n\t\u6b64\u7279\u6027\u901a\u8fc7\u786c\u4ef6\u7cfb\u7edf\u4fdd\u8bc1\u3002<\/p>\n

\n\t\u4f20\u611f\u5668\u7684\u9009\u53d6\uff0c\u5668\u4ef6\u7684\u9009\u53d6\uff08\u7279\u522b\u662f\u6e29\u5ea6\u7279\u6027\uff09\uff0c\u7535\u6e90\u7cfb\u7edf\u8bbe\u8ba1\u3002<\/p>\n

\n\t\u4f20\u611f\u5668\u7684\u52a8\u6001\u7279\u6027<\/p>\n

\n\t\u6b64\u7279\u901a\u8fc7\u8f6f\u4ef6\u7cfb\u7edf\u4fdd\u8bc1\u3002<\/p>\n

\n\t\u5e72\u6270\u4fe1\u53f7\u548c\u6b63\u5e38\u4fe1\u53f7\u7684\u533a\u5206\uff1a<\/p>\n

\n\t\u5e72\u6270\u4fe1\u53f7\u5206\u6210\u968f\u673a\u4fe1\u53f7\u3001\u5468\u671f\u4fe1\u53f7\u5e72\u6270\u548c\u51b2\u51fb\u5e72\u6270\u3002<\/p>\n

\n\t\u6b63\u5e38\u4fe1\u53f7\u7684\u5f62\u5f0f\uff0c\u4e00\u822c\u4e3a\u7ed9\u5b9a\u503c\u3002<\/p>\n

\n\t\u968f\u673a\u4fe1\u53f7\u5e72\u6270\u53ef\u91c7\u53d6\u5e73\u5747\u6ee4\u6ce2\u7684\u65b9\u6cd5\u3002<\/p>\n

\n\t\u51b2\u51fb\u5e72\u6270\uff0c\u53d8\u5316\u7387\u5927\u7684\u592a\u591a\u5219\u4e3a\uff0c\u51b2\u51fb\u5e72\u6270\uff0c\u4f8b\u5982\uff1a\u67d0\u4f20\u611f\u5668\u52a8\u6001\u54cd\u5e94\u901f\u5ea68\u523020mS\uff0c-3DB\u3002\u90a3\u4e48\u6570\u636e<\/p>\n

\n\tLP = 20lg\uff08P\/P0\uff09<\/p>\n

\n\t-3=20lg\uff08P\/P0\uff09<\/p>\n

\n\t-0.15=lg\uff08P\/P0\uff09<\/p>\n

\n\tP\/P0=0.707<\/p>\n

\n\t\u5219\u518d20ms\u5185\uff0c\u6b64\u6b21\u503c\u4e0d\u53ef\u80fd\u5927\u4e8e\uff0c\u4e0a\u6b21\u76840.707\u3002\u5426\u5219\u6b64\u6b21\u503c\u53d60.707\u8fd9\u4e2a\u503c\u3002<\/p>\n

\n\t\u65f6\u57df\u52a8\u6001\u6821\u51c6\u5b9e\u9a8c\u6570\u636e\u5904\u7406\u65b9\u6cd5<\/p>\n

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