US4466117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone for stereo reception
Assignee: AKG Acoustics GmbH
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Filing: 1982-11-12
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Granted: 1984-08-14
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Expires: 2002-11-12
Abstract
Abstract A microphone for receiving acoustic vents stereophonically in accordance with a center-side method comprises a plurality of transducers including at least one having a unilateral directional characteristic particularly cardioid or hypercardioid and at least two other electroacoustic transducers having a figure-eight characteristic which are associated with the unidirectional characteristic transducer and have principal axes at right angles to the main axes of the unidirectional transducer. A common line connects a terminal of each of the three transducers and a connecting line interconnects a respective terminal of each. In addition, the connecting line between the two electroacoustic transducers having a figure-eight characteristic include control means comprising either a switch or a controller.
Inventors
- 👤 Rudolf Gorike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:23
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/027; H04S; H04S1/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
A microphone for receiving acoustic events stereophonically in accordance with a center-side method comprising a plurality of electroacoustic transducers including at least one having a unilateral directional characteristic and a main axis, and at least two electroacoustic transducers having a figure-eight characteristic associated with said unilateral directional characteristic transducer and having a principal axes of right angles to said main axis, a common line interconnecting a terminal of each of said unidirectional characteristic transducer and said electroacoustic transducers having a figure-eight characteristic, each of said transducers having an associated outlet, a connecting line connecting each of said outlets, and control means in said connecting line between the outlet of said two electroacoustic transducers having a figure-eight characteristic.
Claim 2
Dependent Claim
117 words
A microphone for receiving acoustic events stereophonically in accordance with a center-side method comprising a plurality of electroacoustic transducers including at least one having a unilateral directional characteristic and a main axis, and at least two electroacoustic transducers having a figure-eight characteristic associated with said unilateral directional characteristic transducer and having a principal axes of right angles to said main axis, a common line interconnecting a terminal of each of said unidirectional characteristic transducer and said electroacoustic transducers having a figure-eight characteristic, each of said transducers having an associated outlet, a connecting line connecting each of said outlets, and control means in said connecting line between the outlet of said two electroacoustic transducers having a figure-eight characteristic.
Claim 3
Dependent Claim
13 words
A microphone according to claim 1, wherein said control means comprises a switch.
Claim 4
Dependent Claim
13 words
A microphone according to claim 1, wherein said control means comprises a controller.
Claim 5
Dependent Claim
18 words
A microphone according to claim 1, wherein all of said transducers are electrodynamic transducers particularly moving coil systems.
Claim 6
Dependent Claim
53 words
A microphone according to claim 1, wherein said control means comprises at least one of a switch, a controller for each connecting line, each of said transducers having figure-eight characteristics comprising at least one of a slide switch and a slide controller, said microphone including a handle portion with said controller located thereon.
Claim 7
Dependent Claim
30 words
A microphone according to claim 1, wherein said microphone includes a cable portion, said control means being provided on said cable portion on the end thereof remote from said microphone.
Claim 8
Dependent Claim
17 words
A microphone according to claim 1, including a variable resistor connected to said unilateral directional characteristic transducer.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |