US3790711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterophony - simulating earphone
Assignee: Hosiden Electronics Co Ltd
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Filing: 1971-11-22
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Granted: 1974-02-05
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Expires: 1991-11-22
Abstract
Abstract A stereophony-simulating earphone which enables a user of the earphone to hear monaural sound as if it were stereophonic sound. The earphone includes a pair of horseshoe-shaped acoustic paths which lead to left and right ears of the uspr. Mounted at a point on one of the acoustic paths which is one-sided from the midpoint of said one path is a woofer electro-acoustic transducer and mounted at a point on the other of the acoustic paths which is one-sided opposite to said woofer from the midpoint of said other path is a tweeter electro-acoustic transducer. Both electroacoustic transducers are fed by a common monophonic electrical signal to accomplish excellent stereophonic sound simulation.
Inventors
- 👤 S Ojima
- 👤 H Sano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/10; H04R1/1016; H04R1/1058; H04R1/1075; H04R5/00; H04R5/033; H04R5/0335
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
160 words
A stereophony-simulating earphone, comprising: a pair of sound-transmitting earpieces adapted to transmit sound to the ears of the user; a pair of separate, elongated, hollow bodies defining a pair of separate acoustic paths, each body being attached at its opposite ends to said earpieces so that both said acoustic paths are acoustically coupled to both said earpieces; a tweeter electro-acoustic transducer mounted on one of said bodies for supplying acoustic power to one acoustic path and being located at a position on said one path which is closer to one earpiece than it is to the other earpiece; a woofer electro-acoustic transducer mounted on the other of said bodies for supplying acoustic power to the other acoustic path and being located at a position on said other path which is closer to said other earpiece than it is to said one earpiece; and means for supplying a common electrical signal to said woofer electro-acoustic transducer and said tweeter electroacoustic transducer.
Claim 2
Dependent Claim
160 words
A stereophony-simulating earphone, comprising: a pair of sound-transmitting earpieces adapted to transmit sound to the ears of the user; a pair of separate, elongated, hollow bodies defining a pair of separate acoustic paths, each body being attached at its opposite ends to said earpieces so that both said acoustic paths are acoustically coupled to both said earpieces; a tweeter electro-acoustic transducer mounted on one of said bodies for supplying acoustic power to one acoustic path and being located at a position on said one path which is closer to one earpiece than it is to the other earpiece; a woofer electro-acoustic transducer mounted on the other of said bodies for supplying acoustic power to the other acoustic path and being located at a position on said other path which is closer to said other earpiece than it is to said one earpiece; and means for supplying a common electrical signal to said woofer electro-acoustic transducer and said tweeter electroacoustic transducer.
Claim 3
Dependent Claim
46 words
A stereophony-simulating earphone according to claim 1, on which said tweeter electro-acoustic transducer is mounted in said one path at a location close to said one earpiece, and said woofer electro-acoustic transducer is mounted on said other path at a location close to said other earpiece.
Claim 4
Dependent Claim
17 words
A stereophony-simulating earphone according to claim 1, in which said bodies are tubes having the same diameters.
Claim 5
Dependent Claim
17 words
A stereophony-simulating earphone according to claim 3, in which said tubes are of substantially the same length.
Claim 6
Dependent Claim
13 words
A stereophony-simulating earphone according to claim 1, in which said earpieces are earplugs.
Claim 7
Dependent Claim
36 words
A stereophony-simulating earphone according to claim 1, in which said means for supplying a common electrical signal is a single plug adapted to receive the signal, said plug being electrically connected to both of said transducers.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |