Acoustics correcting apparatus

1. An acoustics correcting apparatus, comprising:

a measurement signal supplying section supplying a time stretched pulse (TSP) measurement signal for measurement to multiple speakers at arbitrary positions;

first and second collecting sections spaced apart from each other and collecting sound output from the speakers with the supplied TSP measurement signal;

a first distance calculating section calculating the distance from each of the speakers to the first collecting section based on the first collected signal captured by the first collecting section and the TSP measurement signal;

a second distance calculating section calculating the distance from each of the speakers to the second collecting section based on the second collected signal captured by the second collecting section and the TSP measurement signal;

a position information calculating section calculating position information of each of the speakers from the first and second collecting sections based on the distances from each of the speakers calculated by the first and second distance calculating sections to the first and second collecting sections;

an acoustics measuring section measuring acoustics by the multiple speakers placed at the arbitrary positions based on the first and second collected signals and the TSP measurement signal;

a virtual sound image coefficient selecting section selecting an optimum virtual sound image coefficient from multiple virtual sound image coefficients based on the position information calculated by the position information calculating section;

a correction characteristic calculating section calculating an optimum correction characteristic based on the acoustics measured by the acoustics measuring section;

a virtual sound image localization processing section performing virtual sound image localization processing on reproduction signals for the speakers based on the virtual sound image coefficient selected by the virtual sound image coefficient selecting section; and

an acoustics correcting section correcting the acoustics of the reproduction signals for the speakers based on the correction characteristic calculated by the correction characteristic calculating section, wherein

the acoustics measured by the acoustics measuring section include sound pressure levels of the multiple speakers measured based on the first and second collected signals and the TSP measurement signal, and

the correction characteristic calculating section calculates the optimum correction characteristic based on the sound pressure levels of the multiple speakers.

2. The acoustics correcting apparatus according to claim 1 , wherein

the acoustics measured by the acoustics measuring section further include frequency bands of the multiple speakers measured based on the first and second collected signals and the TSP measurement signal, and

the correction characteristic calculating section calculates the optimum correction characteristic is further based on the frequency bands of the multiple speakers.

3. The acoustics correcting apparatus according to claim 1 , wherein

the acoustics measured by the acoustics measuring section further include frequency response characteristics of the multiple speakers measured based on the first and second collected signals and the TSP measurement signal, and

the correction characteristic calculating section calculates the optimum correction characteristic is further based on the frequency response characteristics of the multiple speakers.

4. An acoustics correcting apparatus that corrects the acoustics of multiple speakers placed at arbitrary positions and performs virtual sound image localization processing based on measurement data measured from first and second collected signals obtained by collecting the sound output by supplying a time stretched pulse (TSP) measurement signal for measurement to the multiple speakers first and second collecting sections spaced apart from each other by a predetermined distance, the apparatus comprising:

a first processing section, based on the measurement data, calculating a correction characteristic that corrects acoustics and calculating a virtual sound image characteristic coefficient for performing virtual sound image localization processing;

a storage section storing an acoustics measuring program causing to measure the measurement data based on the first and second collected signals, a virtual sound image localization processing program causing to perform virtual sound image localization processing on reproduction signals for the speakers based on the virtual sound image characteristic coefficient, and an acoustics correcting program correcting the acoustics of the reproduction signals for the speakers based on the correction characteristic; and

a second processing section reading the acoustics measurement program to supply the TSP measurement signal for measurement to the multiple speakers, measuring the acoustics of the speakers from first and second collected signals by collecting the sound output from the multiple speakers that receive the supply of the TSP measurement signal by the first and second collecting sections and calculating the distances from the speakers to the first and second collecting sections from the first and second collected signals and calculating position information of the speakers from the distances,

wherein the first processing section calculates the correction characteristic based on the acoustics measured by the second processing section and selects an optimum virtual sound image coefficient based on the position information calculated by the second processing section; and

the second processing section performs virtual sound image localization processing on the reproduction signals and corrects the acoustics based on the correction characteristic and the virtual sound image characteristic coefficient, which are calculated by the first processing section, by reading the virtual sound image localization processing program and acoustics correcting program, wherein

the acoustics measuring program is configured to measure sound pressure levels of the multiple speakers based on the first and second collected signals and the TSP measurement signal, and correct the acoustics of the reproduced signal based on the measured sound pressure levels.

5. The acoustics correcting apparatus according to claim 4 , wherein

the acoustics measuring program is further configured to measure frequency bands of the multiple speakers based on the first and second collected signals and the TPS measurement signal, and correct the acoustics of the reproduced signal based on the measured frequency bands of the multiple speakers.

6. The acoustics correcting apparatus according to claim 4 , wherein

the acoustics measuring program is further configured to measure frequency response characteristics of the multiple speakers based on the first and second collected signals and the TSP measurement signal, and correct the acoustics of the reproduced signal based on the measured frequency response characteristics.