Patent ID: 7486797

Claim:
An audio correcting apparatus comprising: a speaker provided on an apparatus; a first microphone provided on an operation device operated by a user; an identifying unit which identifies a first acoustic characteristic from said speaker to said first microphone; a first filter which has the first acoustic characteristic identified by said identifying unit; a second microphone provided on said apparatus; a second filter having a second acoustic characteristic from said speaker to said second microphone; an ambient noise extracting unit which extracts ambient noise from sound collected by said second microphone, wherein the ambient noise is extracted by subtracting a signal obtained by allowing an audio signal input to said speaker to pass through said second filter from a signal representing the sound collected by said second microphone; an identification-signal generating unit which generates an identification signal for use in identifying the first acoustic characteristic and the second acoustic characteristic by said identifying unit, wherein, when the identification signal is output by said identification-signal generating unit, said identifying unit captures and uses sound collected by said first microphone to identify the first acoustic characteristic, while said identifying unit captures and uses the sound collected by said second microphone to identify the second acoustic characteristic; and an audio correcting unit which, based on two input signals, one signal being obtained by allowing the audio signal input to said speaker to pass through said first filter and the other signal representing ambient noise, corrects the sound pressure level of sound output from said speaker so that the sound output from said speaker is clearly heard when reaching the user without being substantially affected by the ambient noise.