| 摘要 |
PURPOSE: A method for measuring the sensitivity of a microphone is provided to maintain the performance of the microphone by improving the quality of voice according to the state of the microphone. CONSTITUTION: A microcomputer(40) regulates the applying time and frequency of power to a microphone(20) by controlling a power switching part(30). The microcomputer supplies power to the microphone based on frequency band by controlling the power switching part. The microphone calculates the output waveform of the microphone. The performance of the microphone for each frequency is verified and the quality of voice is improved using a comparison table including inputted voltage from the microphone, a pre-set output time, and an input time. |
