Resonance frequency detection method, resonance frequency selection method, and, resonance frequency detecting device

摘要

PROBLEM TO BE SOLVED: To solve the following problem; conventionally, to detect a resonance frequency, a signal for measurement has been radiated from a loudspeaker, and received by a microphone to analyze the sound signal received by the microphone, but to accurately detect the resonance frequency, not only the result of this analysis, but also it is necessary for a measuring person after all to listen to the sound and judge the resonance frequency.;SOLUTION: This resonance frequency detection device 20 is provided with a sound source means 21, signal composition changeover means 26, 27, and a measuring means 25. The signal composition changeover means 26, 27 are able to change over from/to a 1st state of outputting the signal for measurement to/from a 2nd state of outputting a composite signal of the signal for measurement and an output signal from the microphone 14. The detection device 20 is so arranged as to detect the resonance frequency based on the comparison between a 1st amplitude frequency characteristic measured in the 1st state output and a 2nd amplitude frequency characteristic measured in the 2nd state.;COPYRIGHT: (C)2004,JPO&NCIPI