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阻抗管校准规范（传递函数法）
Calibration Specification for Impedance Tubes (Transfer Function Method)
价格：￥0.00
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宽带同轴噪声发生器校准规范
Calibration Specification for Broadband Coaxial Noise Generators
价格：￥0.00
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积分平均声级计
Intergrating-averaging sound level meters
价格：￥0.00
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测量耳塞机用阻塞耳道腔模拟器
Occuluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts
价格：￥0.00
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飞机噪声评定用电声测试设备
Electro-acoustical measuring equipment for aircraft noise certification
价格：￥0.00
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声频信号发生器检定规程
Verification Regulation of Audio-Frequency Signal Generators
价格：￥0.00
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声级计
Verification Regulation of Sound Level Meters
价格：￥0.00
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