没有专门的校准设备通常难以进行测试传声器灵敏度校准，这个因素限制了传声器的日常校准。
Generally, it is difficult to calibrate microphone sensitivity without special calibration instruments, which makes the maintenance of microphone can't be done frequently.
驻极体传声器测试仪是用来测试传声器的灵敏度及频率响应的。
The electret microphone tester is used to test electret microphone's sensitivity and frequency response.
驻极体传声器测试仪是用来测试传声器的灵敏度及频率响应的。
The electret microphone tester is used to test electret microphone's sensitivity and frequency response.
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