Acoustic device
First Claim
1. A loudspeaker adapted for operation over an operative frequency range, comprising:
- a member extending transversely of its thickness and capable of sustaining bending waves over an active area of the transverse extent of the member, the member having physical parameters of geometry, bending stiffness, areal mass distribution and damping, the values of which affect the distribution of resonant modes of bending wave vibration over the active area of the member, said parameters having selected values such that the resonant bending wave modes are beneficially distributed in frequency over the active area of the member, anda transducer coupled to the member in a region of the active area of the member where a plurality of lower frequency resonant bending wave modes in the operative frequency range have vibrationally active anti-nodes so that the transducer will couple with the lower frequency bending wave modes.
1 Assignment
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Accused Products
Abstract
Acoustic device including a member extending transversely of its thickness and capable of sustaining bending waves at least over an intendedly consequentially acoustically active area of the transverse extent of said member, the member having, by reason of orderly design methodology disclosed and claimed, a distribution of resonant modes of its natural bending wave vibration at least over said area that is dependent on values of particular parameters of said members, including geometrical configuration and directional bending stiffness(es), which values have been selected to predetermine said distribution of natural resonant modes being consonant with required achievable acoustic action of said member for operation of said device over a desired operative acoustic frequency range.
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Citations
25 Claims
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1. A loudspeaker adapted for operation over an operative frequency range, comprising:
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a member extending transversely of its thickness and capable of sustaining bending waves over an active area of the transverse extent of the member, the member having physical parameters of geometry, bending stiffness, areal mass distribution and damping, the values of which affect the distribution of resonant modes of bending wave vibration over the active area of the member, said parameters having selected values such that the resonant bending wave modes are beneficially distributed in frequency over the active area of the member, and a transducer coupled to the member in a region of the active area of the member where a plurality of lower frequency resonant bending wave modes in the operative frequency range have vibrationally active anti-nodes so that the transducer will couple with the lower frequency bending wave modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification