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| Low Frequency Microphone Calibration Based on the Related Microphones Method |
| CHEN Hong-jiang1, HE Long-biao2 |
1.Hunan Institute of Metrology and Test, Changsha, Hunan 410014, China;
2.National Institute of Metrology, Beijing 100013, China |
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Abstract A new method for frequency response calibration of measured microphones over the range of 0.1 to 250 Hz is described.If required,these frequency response calibrations can be combined with absolute sensitivity calibrations at 251.2 Hz.They might either be performed by comparison with another microphone or by using a calibrated sound source.The effectiveness and practicality of the method are verified by the measurement experiments and datum analysis.
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2013, Vol. 34 
