TRANSMISSION LOSS MEASURING METHOD, TRANSMISSION LOSS MEASURING INSTRUMENT, AND TRANSMISSION LOSS MEASURING PROGRAM

摘要

PROBLEM TO BE SOLVED: To measure transmission loss of a muffler, etc. with high accuracy without knowing absolute sensitivity of a sound sensor.;SOLUTION: By focusing attention on a fact that transmission loss is defined by the ratio of transmitted power to incoming power, the transmission loss is found by performing ratio-finding calculations unexceptionally, such as finding the sensitivity ratio of the sound sensor and finding a spectrum ratio from a sensor output of the sensor.;COPYRIGHT: (C)2004,JPO