JPH1118200A - Three-dimensional stereoscopic sound recorder taking into consideration ear sound radiation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clear fixed position at all three-dimensional positions not only in headphone reproduction but also in normal loudspeaker reproduction by simultaneously recording and reproducing ear sound emission sound, for which a part of sound entering from the ear is passed through an internal ear and emitted as the sound again from the ear drum and external sound. SOLUTION: A diaphragm 5 in a thin-film shape is installed at the boundary of an external auditory canal and a concha respectively on the left and right and the added vibration of the external sound, and the ear acoustic emission sound generated there is converted into electric signals at a vibration electric conversion part 6 and recorded in two left and right channels. Reproduction is performed by a normal headphone or a speaker. Also, since ear sound emission components become weak, and external sound components become strong at the boundary of the external auditory canal and the concha, adjustment is performed by the opening area to an outer side of an outer frame 7 for holding the diaphragm. Also, depending on the kind of converter to the electric signals, electric frequency characteristics are corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of obtaining clear sound localization at all three-dimensional positions.

[0002]

2. Description of the Related Art With respect to a so-called stereophonic sound recording method, various devices have been invented and devised, from a stereo recording device to a binaural recording device using a dummy head or the like and a recent surround recording device. It should be noted that the present invention is a completely different invention which is different in principle from binaural recording.

[0003]

However, from the viewpoint of sound localization, the localization in the rear, front and rear, and vertical directions cannot be said to be sufficient in the current system. There are also drawbacks such as the necessity of headphones for reproduction and the necessity of a large number of speakers.

[0004]

The present invention focuses on otoacoustic emission. Otoacoustic radiation is a well-known phenomenon in which part of the sound coming from the ear is emitted again as sound from the eardrum through the inner ear, but this phenomenon has been completely ignored in conventional recording devices. The inventor considered that the radiated sound plays an important role in specifying a sound generation position in a three-dimensional space, and simultaneously recorded and reproduced an external sound and the radiated sound. As a result, clear localization could be obtained at all three-dimensional positions in the normal speaker playback as well as in the headphone playback.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A thin film-like diaphragm is installed at the boundary between the ear canal and the ear canal on each of the left and right sides, and the added vibration of the external sound and the otoacoustic sound generated here is converted into an electric signal.
Record on the channel. Playback is performed with ordinary headphones or speakers. A known technique is used for converting vibration into an electric signal, a recording device, and a reproducing device. At the boundary between the ear canal and the ear shell, the otoacoustic radiated sound component is weaker than on the eardrum, and the external sound component is stronger.
Adjustment is made based on the area of the opening outside the diaphragm holding frame. Note that electric frequency characteristics are corrected depending on the type of the converter into an electric signal.

[0006]

According to the present invention, a sound image is clearly localized at a position where a sound is generated at the time of recording at any position in three dimensions. Note that in headphone reproduction, out-of-head localization is performed, and in speaker reproduction, almost the same good localization as in headphone reproduction can be obtained without being affected so much by the position of the speaker. Some of the applications of the present invention are described below. 1. Realistic recording of live music. 2. Generation of realistic sound effects in TV games and amusement facilities. 3 Clear recordings of meetings and the like where many people speak.

[Brief description of the drawings]

FIG. 1 is a diagram of an embodiment of the present invention (only one side is shown because it is bilaterally symmetric. Also, the rest of the recording apparatus and subsequent parts are omitted).

FIG. 2 is a detailed cross-sectional view of a vibration detection unit according to the present invention.

[Explanation of symbols]

 1 is a vibration detecting unit 2 is an inner (eardrum side) opening 3 is a rubber belt for fixing the vibration detecting unit 4 is a signal cable 5 is a vibrating plate 6 is a vibrating electric signal converter 7 is a vibrating plate holding outer frame 8 is an outer opening

Claims (1)

[Claims] 1. A recording device for recording an otoacoustic sound generated for a sound when the sound is recorded.