| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic calibrator capable of generating constant sound pressure within a calibration space part, by relatively simple configuration. SOLUTION: This acoustic calibrator for calibrating sensitivity of a microphone 10 is provided with an acoustic element member 4 between the calibration space part and a microphone insertion port 3 to communicate the calibration space part with the microphone insertion port 3. The acoustic element member 4 comprises a through hole 4a having a prescribed inside diameter and a prescribed length, and has a prescribed acoustic impedance. COPYRIGHT: (C)2007,JPO&INPIT
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