Patent ID: 8498429

Claim:
An acoustic correction apparatus comprising: one or ore hardware processors; an input module configured to receive a first audio signal propagated through a sound field; a calculator configured to calculate, by operation of the one or more hardware processor, an impulse response from the audio signal; a divider configured to divide the impulse response into a first impulse response of a first time region preliminarily determined as a time region comprising a direct sound or an initial reflection sound and a second impulse response of a second time region preliminarily determined as a time region comprising a reverberant sound component; a converter configured to convert the first impulse response into a first frequency spectrum and the second impulse response into a second frequency spectrum; an extractor configured to specify, from a cross spectrum between the first frequency spectrum converted from the first impulse response of the first time region and the second frequency spectrum converted from the second impulse response of the second time region, an amplitude component of the second frequency spectrum with a peak relatively higher than that of an amplitude component of the first frequency spectrum, and extract the peak as a resonance component; a synthesizer configured to synthesize a first property with a second property for attenuating the resonance component to generate a synthesized property; and a generator configured to generate, based on the synthesized property, a correction filter configured to correct a second audio signal to be listened to.