US 2002/0159603 A1 · Picked-up-sound reproducing method and apparatus

Abstract

Sound picked up by a microphone of a first sound field is reproduced by a speaker of a second sound field, and a sound picked up by a microphone of the second sound field is reproduced by the speaker of the first sound field. Sound pressure detection section detects a sound pressure of a sound present in the second (or first) sound field picked up by the microphone of the second (or first) sound field, other than a sound reproduced by the speaker of the first (or second) sound field. Other sound pressure detection section detects a sound pressure with which the sound picked up by the microphone of the second (or first) sound field and reproduced by the speaker of the first (or second) sound field is picked up by the microphone of the first (or second) sound field. Sound-pressure-difference detection section adjusts a gain of an automatic gain adjustment section in such a manner that the two detected sound pressures assume a predetermined relationship. Thus, any sound picked up in one of the first and second sound fields can be reproduced in the other sound field with an enhanced sense of unity and connection between the two sound fields.

Claims21

Dependent claims

A picked-up-sound reproducing method for picking up a sound present in a first sound field and reproducing the picked-up sound in a second sound field, said picked-up-sound reproducing method comprising:

a step of detecting a sound pressure present in said first sound field and a sound pressure reproduced in said second sound field;
and
a step of adjusting a sound pressure to be reproduced in said second sound field so that the sound pressure present in said first sound field and the sound pressure to be reproduced in said second sound field assume a predetermined relationship.

A picked-up-sound reproducing apparatus comprising:

a first microphone that is provided at a position of one wall surface of a first sound field to pick up a sound present in said first sound field;
a signal transfer pathway that transmits the sound, picked up by said first microphone, to a second sound field;
a speaker that is provided at a position of one wall surface of a second sound field to reproduce the sound transmitted via said signal transfer pathway;
a second microphone that is provided at a position of the one wall surface of said second sound field to pick up the sound reproduced by said speaker;
a first detection section that detects a sound pressure picked up by said first microphone;
a second detection section that detects a sound pressure with which the sound picked up by said first microphone and reproduced by said speaker is picked up by said second microphone;
and
an adjustment section that adjusts a sound pressure to be reproduced by said speaker in such a manner that the sound pressures detected by said first detection section and said second detection section assume a predetermined relationship.

5 more elements

A picked-up-sound reproducing apparatus comprising:

a first microphone that is provided at a position of one wall surface of a first sound field to pick up a sound present in said first sound field;
a first signal transfer pathway that transmits the sound, picked up by said first microphone, to a second sound field;
a second-sound-field speaker that is provided at a position of one wall surface of said second sound field to reproduce the sound transmitted via said first signal transfer pathway;
a second microphone that is provided at a position of the one wall surface of said second sound field to pick up a sound present in said second sound field;
a second signal transfer pathway that transmits the sound, picked up by said second microphone, to said first sound field;
a first-sound-field speaker that is provided at a position of the one wall surface of said first sound field to reproduce the sound transmitted via said second signal transfer pathway;
a first detection section that detects a sound present in said first sound field picked up by said first microphone;
a second detection section that detects a sound pressure with which the sound present in said first sound field picked up by said first microphone and reproduced by said second-sound-field speaker is picked up by said second microphone;
a first adjustment section that adjusts a sound pressure to be reproduced by said second-sound-field speaker in such a manner that the sound pressures detected by said first detection section and said second detection section assume a predetermined relationship;
a third detection section that detects a sound pressure present in said second sound field picked up by said second microphone;
a fourth detection section that detects a sound pressure with which the sound present in said second sound field picked up by said second microphone and reproduced by said first-sound-field speaker is picked up by said first microphone;
and
a second adjustment section that adjusts a sound pressure to be reproduced by said first-sound-field speaker in such a manner that the sound pressures detected by said third detection section and said fourth detection section assume a predetermined relationship.

10 more elements

Dependencies are inferred from the claim text.

Picked-up-sound reproducing method and apparatus

Life of this patent

Picked-up-sound reproducing method and apparatus

Life of this patent

Abstract

Claims21