Bessel array with full amplitude signal to half amplitude position transducers
First Claim
1. An apparatus comprising:
- a plurality N+M of electroacoustic transducers disposed on substantially regular on-center spacing and coupled to be operated as a Bessel Array, wherein a plurality N of the electroacoustic transducers being disposed at full amplitude positions of the Bessel Array, and a plurality M of the electroacoustic transducers being disposed at half amplitude positions of the Bessel Array;
at least one of the M electroacoustic transducers being coupled to receive a substantially full amplitude signal; and
the at least one of the M electroacoustic transducers being coupled to produce a substantially half amplitude sound output into a listening space.
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Accused Products
Abstract
A Bessel Array loudspeaker in which identical transducers are fed full amplitude signals. The half amplitude output at some Bessel positions can be achieved by angling those transducers to the side or up/down. The half amplitude transducers can be coupled to separate cabinets which can be rotated left/right with respect to the full amplitude transducers'"'"' cabinet, and the rotation can automatically reconfigure the wiring of the half amplitude transducers. The half amplitude output can alternatively be achieved by driving only half of the voice coil windings of the half amplitude transducers. The other half of their voice coil windings can optionally be driven via a low pass filter, to achieve an Improved Bessel with increased bass output and sensitivity.
20 Citations
19 Claims
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1. An apparatus comprising:
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a plurality N+M of electroacoustic transducers disposed on substantially regular on-center spacing and coupled to be operated as a Bessel Array, wherein a plurality N of the electroacoustic transducers being disposed at full amplitude positions of the Bessel Array, and a plurality M of the electroacoustic transducers being disposed at half amplitude positions of the Bessel Array;
at least one of the M electroacoustic transducers being coupled to receive a substantially full amplitude signal; and
the at least one of the M electroacoustic transducers being coupled to produce a substantially half amplitude sound output into a listening space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operating a Bessel Array to produce sound into a listening space, the Bessel Array including N electroacoustic transducers disposed at full amplitude positions and M electroacoustic transducers disposed at half amplitude positions of the Bessel Array, the method comprising:
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providing to each of the N electroacoustic transducers a respective substantially full amplitude signal;
each of the N electroacoustic transducers producing into the listening space a substantially full amplitude sound output;
providing to each of the M electroacoustic transducers a respective substantially full amplitude signal;
each of the M electroacoustic transducers producing into the listening space a substantially half amplitude sound output for at least a portion of its operating bandwidth. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A Bessel Array comprising:
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a plurality N+M of substantially identical multi voice coil electromagnetic transducers coupled to at least one cabinet and disposed at substantially regular on-center spacing;
N of the transducers being disposed at full amplitude positions of the Bessel Array and each having all of its voice coils coupled in parallel to be driven by a full amplitude signal;
M of the transducers being disposed at half amplitude positions of the Bessel Array and each having its voice coils coupled in one of these configurations, (i) in series, (ii) a first proper subset coupled to be driven by a full amplitude signal, and a second proper subset coupled to be driven by a full amplitude signal output from a low-pass filter;
whereby each of the N transducers is coupled to produce full amplitude output and each of the M transducers is coupled to produce output between one eighth and one half amplitude. - View Dependent Claims (19)
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Specification