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1、实测本底噪声：［设计指标35dB（A）]用声级计实测满足设计指标。2、实测混响时间：t设计指标0．5秒1因室内各点T60不尽相同，因此应布几个点测出相应T60后进行平均，求出平均混响时间。测量混响时间方法有两种：（1）测试声源：为粹发声或白噪声等。话筒：应为全指向性话筒
1. Measure noise floor: [Design index 35dB(A)] Measured with a sound level meter to meet design specifications. 2. Measure reverberation time: t Design index 0.5 seconds 1 Because indoor points T60 are not the same, therefore, several points should be measured and then averaged after corresponding T60 to find the average reverberation time. There are two ways to measure the reverberation time: (1) Test sound source: for the vocal or white noise. Microphone: Should be an omnidirectional microphone