Loudspeaker including slotted waveguide for enhanced directivity and associated methods
First Claim
1. A loudspeaker comprising:
- a baffle;
at least one planar diaphragm transducer carried by said baffle and having a front surface for radiating acoustic energy therefrom; and
a slotted waveguide adjacent the front surface of said at least one planar diaphragm transducer.
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Accused Products
Abstract
A loudspeaker may include a baffle, a planar diaphragm transducer carried by the baffle and having a front surface for radiating acoustic energy therefrom, and a slotted waveguide adjacent the front surface of the planar diaphragm transducer. The planar diaphragm transducer may be operable to a desired high frequency, and the slotted opening may have a width not substantially greater than a wavelength corresponding to the desired high frequency. For example, for a desired high frequency of about 20 KHz, the slotted opening may have a width not greater than about two-thirds of an inch. Accordingly, the loudspeaker including the slotted waveguide may provide nearly constant horizontal directivity over a large angle. In another embodiment, the loudspeaker may include a conical diaphragm transducer with a slotted waveguide adjacent its front surface.
46 Citations
38 Claims
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1. A loudspeaker comprising:
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a baffle;
at least one planar diaphragm transducer carried by said baffle and having a front surface for radiating acoustic energy therefrom; and
a slotted waveguide adjacent the front surface of said at least one planar diaphragm transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A loudspeaker comprising:
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a baffle;
at least one planar diaphragm transducer carried by said baffle and having a front surface for radiating acoustic energy therefrom and being operable to a desired high frequency; and
a slotted waveguide adjacent the front surface of said at least one planar diaphragm transducer, said slotted waveguide comprising a body having a slotted opening therein with a width not substantially greater than a wavelength corresponding to the desired high frequency. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for increasing directivity of a loudspeaker comprising a baffle, and at least one planar diaphragm transducer carried by the baffle and having a front surface for radiating acoustic energy therefrom, the method comprising:
positioning a slotted waveguide adjacent the front surface of the at least one planar diaphragm transducer. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A loudspeaker comprising:
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a baffle;
at least one conical diaphragm transducer carried by said baffle and having a front surface for radiating acoustic energy therefrom; and
a slotted waveguide adjacent the front surface of said at least one conical diaphragm transducer. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A method for increasing directivity of a loudspeaker comprising a baffle, and at least one conical diaphragm transducer carried by the baffle and having a front surface for radiating acoustic energy therefrom, the method comprising:
positioning a slotted waveguide adjacent the front surface of the at least one conical diaphragm transducer. - View Dependent Claims (34, 35, 36, 37, 38)
Specification