消音房分全消音房、半消音房和卦限消音房三種類(lèi)型。

There are three types of sound-absorbing rooms: fully sound-absorbing rooms, semi sound-absorbing rooms, and hexagram limited sound-absorbing rooms.

　　（一）全消音房

（1） Fully anechoic room

　　1. 定義：房間的六個(gè)面全部鋪設(shè)吸聲層

1. Definition: All six sides of the room are covered with sound-absorbing layers

　　2. 適用范圍：（1）要求測(cè)量誤差比較小，如要求在±1分貝以?xún)?nèi)

2. Scope of application: (1) The measurement error is required to be relatively small, such as within ± 1 decibel

　?。?）針對(duì)測(cè)量聲源的方向特性等有特殊要求

(2) There are special requirements for measuring the directional characteristics of sound sources

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（2） Semi anechoic room

　　1.定義：房間的六個(gè)面中只有五個(gè)面或四個(gè)面鋪吸聲層

1. Definition: Only five or four out of the six faces of a room are covered with sound-absorbing layers

　　2．適用范圍：被測(cè)噪聲的機(jī)器很笨重，難以在全消音房中安放，

2. Scope of application: The machine being tested for noise is bulky and difficult to place in a fully anechoic room,

　　而測(cè)量誤差允許較大時(shí)，可以設(shè)計(jì)半消音房完成其測(cè)試工作。

When the measurement error is allowed to be large, a semi anechoic room can be designed to complete its testing work.

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