Digital Loudspeaker
First Claim
Patent Images
28. A loudspeaker comprising:
- a region devoid of electroacoustic transducers;
a first group of electroacoustic transducers at the periphery of said region, said first group of transducers being configured to produce a first sound field representative of a first audio signal;
a second, different, group of electroacoustic transducers at the periphery of said closed region, said second group of transducers being configured to produce a second, different, sound field representative of a second audio signal;
wherein one of said first sound field and said second sound field is a directable sound beam.
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Abstract
A loudspeaker comprises a region devoid of electroacoustic transducers and at least two groups of electroacoustic transducers at the periphery of the region. Each of the groups is configured to produce a different sound field representative of an audio signal and each of the groups comprise a different set of transducers. This allows a more compact loudspeaker to be provided because the transducers can be located around the periphery of a visual display screen. Sound quality is not compromised because groups of transducers forming a subset of the totality of transducers are used for each sound signal, thereby avoiding alias beams.
100 Citations
57 Claims
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28. A loudspeaker comprising:
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a region devoid of electroacoustic transducers;
a first group of electroacoustic transducers at the periphery of said region, said first group of transducers being configured to produce a first sound field representative of a first audio signal;
a second, different, group of electroacoustic transducers at the periphery of said closed region, said second group of transducers being configured to produce a second, different, sound field representative of a second audio signal;
wherein one of said first sound field and said second sound field is a directable sound beam. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 55)
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- 52. A digital loudspeaker comprising an array of electroacoustic transducers, used in two or more non-identical groups, each group forming a DDAL, so as to produce two or more different and simultaneous sound fields, each representative of different audio signals.
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53. A loudspeaker comprising a closed region devoid of electroacoustic transducers, said closed region having a set of more than four electroacoustic transducers positioned close to or adjacent to its outer edge, so as to not overlap the closed region and not to substantially overlap each other, the surface area of the closed region being substantially greater than the acoustic-radiating surface area of any of the transducers;
wherein the set of electroacoustic transducers are arranged to produce a directable sound beam. - View Dependent Claims (54, 57)
Specification