Parametric transducers and related methods
First Claim
Patent Images
1. An audio emitter, comprising:
- a support member operable to support a sound emittive material;
a sound emittive material carried by the support member, the sound emittive material having a front face and a rear face, the rear face supported by the support member; and
a protective screen having a plurality of apertures formed therein;
the protective screen being separated from the front face of the sound emittive material by an airspace, the airspace extending across the front face of the sound emittive material between the sound emittive material and the protective screen;
the protective screen being spaced by the airspace a predetermined distance from the sound emittive material, said predetermined distance being a function of a resonant frequency of the audio emitter.
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Abstract
An audio emitter comprises a support member operable to support a sound emittive material and a sound emittive material carried by the support member. A protective screen has a plurality of apertures formed therein, the protective screen being spaced a predetermined distance from the sound emittive material, said predetermined distance being a function of a resonant frequency of the audio emitter.
148 Citations
20 Claims
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1. An audio emitter, comprising:
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a support member operable to support a sound emittive material; a sound emittive material carried by the support member, the sound emittive material having a front face and a rear face, the rear face supported by the support member; and a protective screen having a plurality of apertures formed therein; the protective screen being separated from the front face of the sound emittive material by an airspace, the airspace extending across the front face of the sound emittive material between the sound emittive material and the protective screen; the protective screen being spaced by the airspace a predetermined distance from the sound emittive material, said predetermined distance being a function of a resonant frequency of the audio emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of increasing output of an audio emitter that includes a sound emittive material and a protective screen, comprising:
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calculating a predetermined distance at which the protective screen is spaced by an airspace from the sound emittive material such that operation of the emitter creates standing acoustic waves in the airspace between a face of the sound emittive material and an opposing face of the protective screen to thereby enhance a resonant frequency at which the emitter operates;
whereinthe protective screen is spaced from the sound emittive material such that the airspace extends across the face of the sound emittive material. - View Dependent Claims (12, 13, 14, 15)
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16. A method of increasing output of an audio emitter having a sound emittive material and a protective screen, comprising:
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adjusting an acoustic impedance of an airspace between a face of the sound emittive material and an opposing face of the protective screen by adjusting a predetermined distance at which the face of the sound emittive material and an opposing face of the protective screen are spaced from one another by the airspace to thereby enhance a resonant frequency at which the emitter operates; and fixing the protective screen at the predetermined distance from the sound emittive material to maintain the airspace extending across the opposing face of the sound emittive material. - View Dependent Claims (17, 18, 19, 20)
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Specification