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class="news_detail"> <h1>個人噪聲劑量計的四種靈敏度表示</h1> <div id="2qiaaya" class="nwdtl_tip"><span>更新時間：2023-12-21</span><span>瀏覽：2192次</span></div> <div id="00eyqqm" class="nwdtl_con"> 噪聲計中的頻率計權網(wǎng)絡有A、B、C三種標準計權網(wǎng)絡。<div>A、網(wǎng)絡是模擬人耳對等響曲線中40方純音的響應，它的噪聲計曲線形狀與340方的等響曲線相反，從而使電信號的中、低頻段有較大的衰減；</div><div>B、網(wǎng)絡是模擬人耳對70方純音的響應，它使電信號的低頻段有一定的衰減；</div><div>C、網(wǎng)絡是模擬人耳對100方純音的響應，在整個聲頻范圍內有近乎平直的響應。</div><div>測量噪聲用的聲級計，表頭響應按靈敏度可分為四種：</div><div>1、“慢”：表頭時間常數(shù)為1000ms，―般用于測量穩(wěn)態(tài)噪聲，測得的數(shù)值為有效值。</div><div>2、”快”：表頭時間常數(shù)為125ms，一般用于測量波動較大的不穩(wěn)態(tài)噪聲和交通運輸噪聲等。快檔接近人耳對聲音的反應。</div><div>3、“脈沖或脈沖保持”：表針上升時間為35ms，用于測量持續(xù)時間較長的脈沖噪聲，如沖床、按錘等，測得的數(shù)值為最大有效值。</div><div>4、“峰值保持”：表針上升時間小于20ms。用于測量持續(xù)時間很短的脈沖聲，如槍、炮和爆炸聲，測得的數(shù)值是峰值，即最大值。</div><div><strong>個體噪聲劑量計</strong>采用數(shù)字信號處理技術，可同步測量多種評價指標。該儀器采用模塊化設計，用戶可以根據(jù)需求選擇相應的模塊。它具有多功能、高性能、體積小、耗電低等優(yōu)點。</div><div>執(zhí)行標準：</div><div>聲級計符合：GB/T 3785.1—2023 2級/IEC 61672-1:2013 Class 2</div><div>聲暴露計符合：GB/T 15952—2010 /IEC 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