US 5,260,920 AGranted

Acoustic space reproduction method, sound recording device and sound recording medium

AssigneeYamaha Corporation

InventorsHiroaki Ide, Hidefumi Nagai

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Abstract

A system for reproducing a sound field simulating a real acousting space includes a sound collecting device, a sound recording device and a sound reproducing device. The sound collecting device includes first and second collection systems, the first collection system having non-directional microphones at respective corners of a cube defining a hypothetical three-dimensional space in the real acoustic space and the second collection system having directional microphones of the same number as the non-directional microphones concentrically within the three-dimensional space with directivity of each of the directional microphones being set in the direction of one of the non-directional microphones with which the directional microphone constitutes a pair. Collected sounds by the first and second collection systems of the sound collection device are mixed with each other and recorded on a recording medium by the sound recording device, and further provided on the sound reproducing device. The sound reproducing device has plural loudspeakers of the same number as the non-directional microphones in positions corresponding to the non-directional microphones in the three-dimensional space, and reproduces the collected sounds from the loudspeakers.

Claims11

Dependent claims

A method of reproducing an acoustic space comprising:

providing, in an acoustic space from which sounds are to be recorded, first sound collection means comprising plural non-directional microphones disposed in a hypothetical three-dimensional space of a sound collection system having a predetermined size, and second sound collection means comprising plural directional microphones of the same number as the non-directional microphones of the first sound collection means disposed concentrically inside of the hypothetical three-dimensional space of the sound collection system, directivity of each of the directional microphones being set in the direction of one of the non-directional microphones with which said directional microphone constitutes a pair;
collecting sounds in the acoustic space by the microphones of the first and second sound collection means;
providing reproduction means comprising loudspeakers of the same number as the non-directional microphones of the first sound collection means disposed in positions corresponding to the non-directional microphones in a three-dimensional space of a reproduction system which is proportional in size to the hypothetical three-dimensional space defined by the first sound collection means;
mixing a sound collection signal from each of the non-directional microphones of the first sound collection means with a sound collection signal from one of the directional microphones of the second sound collection means with which said non-directional microphone of the first sound collection means constitutes a pair;
and
reproducing the mixed signal from one of the loudspeakers corresponding to said non-directional microphone.

3 more elements

Dependencies are inferred from the claim text.