杭州电声厂消声室主要用于鉴测电声设备的声学指标.消声室挂设尖劈后的尺寸为11.46m×7.38m×6.49m,有效容积549m~3,总表面积414m~2. 消声室建成后声学测定的结果表明,达到了预期的设计要求: 1.在强噪声和冲击振动的作用下,消声室内的噪声级小于17.5dBA和PNC-15噪声评价曲线; 2.消声室的截止频率f≥50Hz; The anechoic chamber of Hangzhou Electroacoustic Factory is mainly used to test the acoustical indexes of electroacoustic equipments.The dimension of the anechoic chamber after hanging wedges is 11.46m × 7.38m × 6.49m, effective volume is 549m ~ 3, total surface area is 414m ~ 2 The result of acoustic measurement after the anechoic chamber is completed shows that the expected design requirements have been reached: 1. The noise level in the anechoic chamber is less than 17.5dBA and PNC-15 noise evaluation curve under strong noise and shock vibration; The cut-off frequency of anechoic chamber f≥50Hz;