Patent EP0284286A2 successfully refreshed from Google Patents.
EP0284286A2
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Stereo electroacoustical transducing
Assignee: Bose Corp
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Filing: 1988-03-16
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Granted: —
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Expires: 2008-03-16
Abstract
Abstract Stereo electroacoustical transducing apparatus is disclosed having left and right channels with woofer means (11a) for receiving left and right input audio electrical signals at first and second inputs (31L/R) and providing left and right output electrical signals. The woofer means (11a) has an acoustic response that falls off sharply above a predetermined upper cutoff frequency in the lower range of audio frequencies and including a woofer enclosure (11) for supporting woofer driver means (21-26L/R, 31L/R) for radiating in phase spectral components of the left and right input signals below the predetermined upper cutoff frequency. Left (13) and right (12) satellite radiating means radiate sound signals representative of the left and right output signals respectively, and the left and right output electrical signals are coupled to the left (13) and right (12) satellite means.
Inventors
- 👤 William P. Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 08:45
CPC Classifications
H; H04; H04S; H04S3/00; H04R; H04R5/00; H04R5/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
136 words
Stereo electroacoustical transducing apparatus comprising: left and right channels; woofer means (11a) for receiving left and right input audio electrical signals at first and second inputs (31L/R) and providing left and right output electrical signals, the woofer means (11a) having an acoustic response that falls off sharply above a predetermined upper cutoff frequency in the lower range of audio frequencies and including a woofer enclosure (11) for supporting woofer driver means (21-26L/R, 31L/R) for radiating in phase spectral components of the left and right input signals below the predetermined upper cutoff frequency; left (13) and right (12) satellite radiating means for radiating sound signals representative of the left and right output signals respectively; and, means (32L/R, 33L/R) for coupling the left and right output electrical signals to the left (13) and right (12) satellite means respectively.
Claim 2
Dependent Claim
136 words
Stereo electroacoustical transducing apparatus comprising: left and right channels; woofer means (11a) for receiving left and right input audio electrical signals at first and second inputs (31L/R) and providing left and right output electrical signals, the woofer means (11a) having an acoustic response that falls off sharply above a predetermined upper cutoff frequency in the lower range of audio frequencies and including a woofer enclosure (11) for supporting woofer driver means (21-26L/R, 31L/R) for radiating in phase spectral components of the left and right input signals below the predetermined upper cutoff frequency; left (13) and right (12) satellite radiating means for radiating sound signals representative of the left and right output signals respectively; and, means (32L/R, 33L/R) for coupling the left and right output electrical signals to the left (13) and right (12) satellite means respectively.
Claim 3
Dependent Claim
29 words
Stereo electroacoustical transducing apparatus according to claim 1, wherein the woofer driver means comprises left (21L) and right (21R) woofers energized by the left and right input signals respectively.
Claim 4
Dependent Claim
49 words
Stereo electroacoustical transducing apparatus according to claim 1 or 2, wherein the woofer means (11a) includes left (22L) and right (22R) passive equalizing means for equalizing the left (13) and right (12) satellite means respectively, to provide a more uniform radiation response from the left and right satellite means.
Claim 5
Dependent Claim
22 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the woofer means (11a) is free of electrical crossover networks.
Claim 6
Dependent Claim
21 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the predetermined upper cutoff frequency is substantially 150 Hz.
Claim 7
Dependent Claim
25 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the woofer means (11a) comprises dual ports as the sole acoustic output means.
Claim 8
Dependent Claim
21 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the satellite means (13,12) comprises a plurality of enclosures.
Claim 9
Dependent Claim
73 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein each of the satellite means (13,12) comprises upper (13U,12U) and lower (13L,12L) enclosures, each having a respective driver (41L/R,34L/R) of each of the sattelite means comprises a plug(42L/R)-and-jack (37L/R) connector for electrically and mechanically connecting the upper (13U,12U) and lower (13L,12L) enclosures while allowing relative selectable angular displacement therebetween to control the relative direction of radiation from the satellite means drivers.
Claim 10
Dependent Claim
55 words
Stereo electroacoustical transducing apparatus according to claim 8 or 9, wherein one (13L,12L) of the satellite means enclosures (13L/U,12L/U) includes means (35L/R,36L/R,34L/R,42L/R) for selectively bypassing a predetermined range of spectral components from one of the satellite means drivers (34L/R), while augmenting that same predetermined range of spectral components for the other satellite means driver (41L/R).
Claim 11
Dependent Claim
18 words
Stereo electroacoustical transducing apparatus according to claim 10, wherein the means for selectively bypassing includes a switch (36L/R).
Claim 12
Dependent Claim
29 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the woofer enclosure (11) includes electronic means for powering the woofer driver means and the satellite means.
Claim 13
Dependent Claim
91 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, further comprising: protection circuit means (25L/R,26L/R) in each channel for attenuating signals in a respective channel in response to an overlead condition, and means (26R/L) for intercoupling the protection circuit means (25L/R) in each channel with that of the other (25R/L) so that the occurrence of attenuation in one channel in response to an overload in that channel is accompanied by corresponding attenuation in the other channel so that the signals then fed through both channels are substantially in balance.
Claim 14
Dependent Claim
35 words
Stereo electroacoustical transducing apparatus according to any of the prececing claims, wherein the left (13) and right (12) satellite radiating means each comprises at least two transducers, each radiating different portions of the audio spectrum.
Claim 15
Dependent Claim
37 words
Stereo electroacoustical transducing apparatus according to any of the preceding claims, wherein the woofer driver means comprises at least two left and the same number of right woofers energized by said left and right input signals respectively.
Claim 16
Dependent Claim
30 words
Stereo electroacoustical transducing apparatus according to claim 1, wherein the woofer driver comprises a voice coil component with two separate windings energized by the left and right input signals respectively.
Claim 17
Dependent Claim
45 words
Stereo electroacoustical apparatus according to claim 1, wherein the woofer enclosure (11) includes electronic means for powering the woofer driver means and the satellite means, which comprises an electronically summed left and right signal means to provide a monaural signal to drive the woofer means.
Claim 18
Dependent Claim
21 words
Stereo electroacoustic apparatus according to any of the preceding claims, wherein said woofer enclosure means comprises separate left and right enclosures.
Claim 19
Dependent Claim
24 words
Stereo electroacoustic apparatus according to any of the preceding claims, wherein the satellite radiating means (13,12) is physically attached to the woofer means (11a).
References Cited (Backward Citations)
No citation records indexed.
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