{"id":19289,"date":"2011-01-06T17:53:17","date_gmt":"2011-01-06T09:53:17","guid":{"rendered":"http:\/\/highscope.ch.ntu.edu.tw\/wordpress\/?p=19289"},"modified":"2021-10-06T16:29:35","modified_gmt":"2021-10-06T08:29:35","slug":"%e8%81%b2%e9%9f%b3%e7%9a%84%e5%82%b3%e6%92%ad%ef%bc%88sound%ef%bc%89","status":"publish","type":"post","link":"http:\/\/localhost\/%e8%81%b2%e9%9f%b3%e7%9a%84%e5%82%b3%e6%92%ad%ef%bc%88sound%ef%bc%89\/","title":{"rendered":"\u8072\u97f3\u7684\u50b3\u64ad\uff08Sound\uff09"},"content":{"rendered":"<div class=\"pf-content\"><p><strong><span style=\"color: #ff6600;\"><span style=\"color: #ff6600;\">\u8072\u97f3\u7684\u50b3\u64ad<\/span>\uff08Sound\uff09<br \/>\n<\/span><span style=\"color: #008000;\">\u5929\u4e3b\u6559\u66c9\u660e\u5973\u5b50\u9ad8\u7d1a\u4e2d\u5b78\u7269\u7406\u79d1\u674e\u5fe0\u7fa9\u8001\u5e2b\/\u570b\u7acb\u81fa\u7063\u5e2b\u7bc4\u5927\u5b78\u7269\u7406\u7cfb\u8521\u5fd7\u7533\u6559\u6388\u8cac\u4efb\u7de8\u8f2f<\/p>\n<p><\/span><\/strong>\u8072\u97f3\u662f\u4e00\u7a2e\u884c\u9032\u6ce2\uff08travelling waves\uff09\uff0c\u53ef\u4ee5\u5728\u56fa\u9ad4\u3001\u6db2\u9ad4\u6216\u6c23\u9ad4\u4e2d\u50b3\u905e\uff0c\u800c\u4e14\u50b3\u905e\u8072\u97f3\u7684\u4ecb\u8cea\uff08medium\uff09\u6703\u7522\u751f\u58d3\u529b\u7684\u9031\u671f\u8b8a\u5316\uff0c\u56e0\u6b64\u8072\u97f3\u6709\u6240\u8b02\u7684\u983b\u7387\uff08frequency\uff09\u3002\u4e00\u500b\u8072\u6e90\u7522\u751f\u7684\u8072\u97f3\u662f\u5426\u53ef\u4ee5\u807d\u898b\uff0c\u9664\u4e86\u8207\u97f3\u91cf\u5927\u5c0f\u6709\u95dc\u5916\uff0c\u540c\u6642\u8207\u983b\u7387\u4e5f\u6709\u95dc\u3002<!--more--><\/p>\n<p>\u4eba\u8033\u53ef\u4ee5\u807d\u898b\u8072\u97f3\u7684\u983b\u7387\u7bc4\u570d\u5927\u7d04\u4ecb\u65bc20Hz\u81f320,000Hz\u4e4b\u9593\uff0c\u7576\u7136\u9019\u4e0d\u662f\u660e\u78ba\u7684\u7bc4\u570d\uff0c\u5927\u81f4\u4e0a\u56e0\u4eba\u800c\u7570\uff0c\u4e14\u4e0a\u9650\u503c\u901a\u5e38\u6703\u96a8\u5e74\u7d00\u800c\u905e\u6e1b\u3002\u5176\u4ed6\u52d5\u7269\u5247\u6709\u4e0d\u540c\u7684\u983b\u7387\u7bc4\u570d\uff0c\u5982\u72d7\u53ef\u4ee5\u807d\u898b20,000Hz\u4ee5\u4e0a\u7684\u8072\u97f3\u3002<\/p>\n<p>\u8072\u97f3\u5c6c\u529b\u5b78\u6ce2\uff08mechanical 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modulus\uff09\u8207\u300e\u4ecb\u8cea\u5bc6\u5ea6\u300f\uff08density\uff09\u6bd4\u503c\u7684\u5e73\u65b9\u6839\uff0c\u800c\u4e14\u5e38\u53d7\u5230\u5468\u906d\u74b0\u5883\u689d\u4ef6\u6539\u8b8a\u7684\u5f71\u97ff\u3002\u8209\u4f8b\u800c\u8a00\uff0c\u8072\u97f3\u5728\u7a7a\u6c23\u4e2d\u50b3\u905e\u7684\u901f\u7387\u4fbf\u8207\u6eab\u5ea6\u6709\u95dc\uff1a\u572820\u2103\u3001\u6d77\u5e73\u9762\u4e0a\uff0c\u8072\u97f3\u7684\u901f\u7387\u5927\u7d04343 m\/s\uff0c\u4e4b\u5f8c\u96a8\u6eab\u5ea6\u7684\u8b8a\u5316\u5927\u7d04\u6eff\u8db3\u300ev = (331 + 0.6T) m\/s \u300f\u7684\u516c\u5f0f\u3002\u800c\u5728\u6c34\u4e2d\uff0c20\u2103\u6642\u8072\u97f3\u7684\u901f\u7387\u5247\u5927\u7d04\u70ba1,482 m\/s\uff0c\u5728\u92fc\u9435\u6750\u8cea\u4e2d\u5247\u5927\u7d045,960 m\/s\u3002\u6b64\u5916\u8072\u97f3\u7684\u901f\u7387\u8207\u81ea\u8eab\u632f\u5e45\u7684\u5927\u5c0f\u4e5f\u6709\u4e9b\u5fae\u76f8\u95dc\uff0c\u56e0\u6b64\u6574\u9ad4\u800c\u8a00\uff0c\u8072\u97f3\u7684\u901f\u7387\u8207\u5404\u6027\u8cea\u4e4b\u9593\u4e26\u7121\u7c21\u55ae\u7684\u7dda\u6027\u76f8\u95dc\u3002<\/p>\n<p><strong>\u53c3\u8003\u8cc7\u6599\uff1a<\/strong><br \/>\n1.\u7dad\u57fa\u767e\u79d1&#8211;\u8072\u97f3\u00a0\u00a0<a href=\"http:\/\/en.wikipedia.org\/wiki\/Sound\" target=\"_blank\">http:\/\/en.wikipedia.org\/wiki\/Sound<\/a><\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u8072\u97f3\u7684\u50b3\u64ad\uff08Sound\uff09 \u5929\u4e3b\u6559\u66c9\u660e\u5973\u5b50\u9ad8\u7d1a\u4e2d\u5b78\u7269\u7406\u79d1\u674e\u5fe0\u7fa9\u8001\u5e2b\/\u570b\u7acb\u81fa\u7063\u5e2b\u7bc4\u5927\u5b78\u7269\u7406\u7cfb\u8521\u5fd7\u7533\u6559\u6388\u8cac\u4efb\u7de8\u8f2f 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