US3969583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stereophonic recording
Assignee: Sennheiser Electronic GmbH and Co KG
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Filing: 1974-04-16
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Granted: 1976-07-13
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Expires: 1994-04-16
Abstract
Abstract An improved technique for recording by means of head-mounted stereophonic microphones is described. The microphones are disposed for detecting waves from a sound source at a reference location within the ears of the listener corresponding to a position slightly in front of the ear canal at which reproduction of sound via earphones is optimum. The long-term storage effects provided by the brain of the person doing the recording are reproduced on the recording to provide a high degree of realism.
Inventors
- 👤 Hans-Joachim Griese
- 👤 Paul-Friedrich Warning
- 👤 Klaus-Hinrich Wichmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/08; H04R5/00; H04R5/027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
In a method of stereophonic recording wherein sound waves are detected by a pair of head-mounted stereophonic microphones individually disposed within a pair of actual or simulated human ears and wherein the detected sound waves are recorded, the improvement which comprises the step of locating the sound inlet of each microphone at prescribed reference points disposed in front of the entrance to the ear canal.
Claim 2
Dependent Claim
65 words
In a method of stereophonic recording wherein sound waves are detected by a pair of head-mounted stereophonic microphones individually disposed within a pair of actual or simulated human ears and wherein the detected sound waves are recorded, the improvement which comprises the step of locating the sound inlet of each microphone at prescribed reference points disposed in front of the entrance to the ear canal.
Claim 3
Dependent Claim
61 words
In a method of stereophonic recording wherein sound waves are detected by a pair of head-mounted stereophonic microphones and wherein such detected sound waves are recorded, the improvement which comprises the step of locating the sound inlets of each microphone within the ears of a human listener at prescribed reference points disposed in front of the entrance to the ear canal.
Claim 4
Dependent Claim
61 words
In a method of stereophonic recording wherein sound waves are detected by a pair of head-mounted stereophonic microphones and wherein such detected sound waves are recorded, the improvement which comprises the step of locating the sound inlets of each microphone within the ears of a human listener at prescribed reference points disposed in front of the entrance to the ear canal.
Claim 5
Dependent Claim
36 words
The improved method as defined in claim 2, in which the detecting step is carried out with stereophonic microphones whose active dimensions are small compared to the shortest wavelength of the sound waves to be recorded.
Claim 6
Dependent Claim
38 words
The improved method as defined in claim 2, further comprising the step of supporting the microphones on respectively opposite ends of an elastic chinstrap to support the microphones in the operative position within the ears of the listener.
Claim 7
Dependent Claim
25 words
The improved method as defined in claim 2, in which each reference point is disposed approximately 10mm outside the entrance of the associated ear canal.
Claim 8
Dependent Claim
20 words
The improved method as defined in claim 2, in which the recording step is carried out with stereophonic condenser microphones.
References Cited (Backward Citations)
US2481911A
Cited
US3789164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |