Volume error measuring device and volume error measurement method

摘要

PROBLEM TO BE SOLVED: To accurately evaluate the accuracy of a sound volume of a measurement target equipment which is measured at an evaluation position in an environment including a noise source.;SOLUTION: A simulated sound volume measurement apparatus 50 calculates a coherence (coherence Coh12 between sound source and noise source) between a sound volume measured by a microphone S1 and a sound volume measured by a microphone S2, calculates a coherence (coherence Coh13 between sound source and evaluation position ) between a sound volume measured by a microphone S1 and a sound volume measured by a microphone R1, and calculates a sound volume of a simulated sound source 52 at an evaluation position based on the coherence Coh12 between the sound source and the noise source and the sound volume measured by the microphone R1. Furthermore, the simulated sound volume measurement apparatus 50 derives predicted error data indicating a relationship between the coherence Coh12 between the sound source and the noise source, the coherence Coh13 between the sound source and the evaluation position and an error predicted to a sound volume of the simulated sound source 52 at the evaluation position.;COPYRIGHT: (C)2012,JPO&INPIT