US4143244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binaural sound reproducing system
Assignee: Victor Company of Japan Ltd
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Filing: 1976-12-21
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Granted: 1979-03-06
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Expires: 1996-12-21
Abstract
Abstract A binaural sound reproducing system includes a transducer for translating the recorded binaural information into an electrical signal on each of separate channels and a convolution integrator on each separate channel connected to receive the output from the transducer to compensate for acoustical differences resulting from the facial difference between the dummy head used for recording the binaural signal and a particular listener.
Inventors
- 👤 Makoto Iwahara
- 👤 Fumio Maruyama
- 👤 Goro Fujiki
- 👤 Toshinori Mori
- 👤 Norio Hiyama
- 👤 Mitsuru Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:32
CPC Classifications
H; H04; H04S; H04S1/00; H04S1/002; H04S1/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A method of compensating for differences between the acoustic characteristic of a dummy head simulating a human head and the acoustic characteristic of a listener, comprising the steps of: generating acoustic energy varying in frequency with time in an audible range to give a constant sound pressure level at a given point of a listening area throughout said frequency range; plotting the sound pressure at ears of said listener located at said given point as a function of frequency to determine the acoustic characteristic of said listener; locating said dummy head at said given point to receive said acoustic energy at the artificial ears of the dummy head and connecting the received energy to a stereophonic sound reproduction system to produce a signal representative of said acoustic energy at the ears of said listener; successively delaying said signal in a respective channel of the sound reproduction system; providing weighting factors to the nondelayed and successively delayed signals; summing up the weighted signals; and adjusting each of said weighting factors such that the sound pressure level at the ears of said listener varies identically with said determined acoustic characteristic of said listener.
Claim 2
Independent Claim
191 words
A method of compensating for differences between the acoustic characteristic of a dummy head simulating a human head and the acoustic characteristic of a listener, comprising the steps of: generating acoustic energy varying in frequency with time in an audible range to give a constant sound pressure level at a given point of a listening area throughout said frequency range; plotting the sound pressure at ears of said listener located at said given point as a function of frequency to determine the acoustic characteristic of said listener; locating said dummy head at said given point to receive said acoustic energy at the artificial ears of the dummy head and connecting the received energy to a stereophonic sound reproduction system to produce a signal representative of said acoustic energy at the ears of said listener; successively delaying said signal in a respective channel of the sound reproduction system; providing weighting factors to the nondelayed and successively delayed signals; summing up the weighted signals; and adjusting each of said weighting factors such that the sound pressure level at the ears of said listener varies identically with said determined acoustic characteristic of said listener.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |