SOUND FIELD CORRECTION APPARATUS, CONTROL METHOD THEREOF, AND COMPUTER-READABLE STORAGE MEDIUM

摘要

An impulse response between a sound-producing source and a listening point in an acoustic space is measured. A frequency characteristic serving as the processing target of sound field correction is derived from the impulse response. A level difference at a boundary frequency between a level representing a low frequency band and a level representing middle and high frequency bands is calculated for the low frequency band equal to or lower than the boundary frequency and the middle and high frequency bands higher than the boundary frequency in the frequency characteristic. The level of a target characteristic in the low frequency band in the frequency characteristic is decided to set the level difference after sound field correction to be equal to or smaller than a predetermined value.

主权项

1. A sound field correction apparatus that corrects influence of interference between a plurality of sound waves on a frequency characteristic in an acoustic space to obtain a target characteristic, comprising:
a measurement unit configured to measure an impulse response between a sound-producing source and a listening point in the acoustic space; a derivation unit configured to derive, from the impulse response, a frequency characteristic serving as a processing target of sound field correction; a calculation unit configured to calculate a level difference at a boundary frequency between a level representing a low frequency band and a level representing middle and high frequency bands for the low frequency band not higher than the boundary frequency and the middle and high frequency bands higher than the boundary frequency in the frequency characteristic; and a decision unit configured to decide a level of a target characteristic in the low frequency band in the frequency characteristic to set the level difference after sound field correction to be not larger than a predetermined value.