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風機噪聲的測量方法

來源： | 發布日期：2022-11-18

1適用範圍
本方法適用于所有形式 離心風機所發出的正常噪聲的噪聲級的測量。
2.名術語的定義
本文中所用的主要名詞術語的定義如下:
(1)噪声级用普通噪声计中规定的噪声计或者性能相同乃至更好的测量仪测得的值[dB(A)]。
(2)噪声频谱以声压级表示某一频率范围内的噪声分量的值。
(3)环境噪声是指没有测量对象时，其测点周围的噪声。
(3)声源是指離心風機進氣口、出氣口、機殼等處發出的噪聲之源。
(5)置换噪声是指在测量对象声源之外的小型，且发出频率范围宽的声源，它用于确定声场。
(6)标准距离是指声源与噪声测点距离的量，测量进气口、出气口发出的噪声时，取等于叶轮直径的距离，或者叶轮直径小于 1m 时取其1m的距离，测量机壳发出的噪声时，取值为1m 的距离。
(7)測量值對噪聲計的讀數作了環境噪聲修正後的值。
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