US 7,158,647 B2Granted

Acoustic device

AssigneeNew Transducers Limited

InventorsHenry Azima, Martin Colloms, Neil Harris

Life of this patent

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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.

Claims25

Dependent claims

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, 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.

Dependencies are inferred from the claim text.

Facts

Application: 11/072,496Filed 7 Mar 2005 · division
Priority: GB 9517918.02 Sep 1995
Published: US 2005/0147273 A17 Jul 2005
Granted: 2 Jan 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification53 codes

H04R 7/08
Comprising a plurality of sections or layers: comprising superposed layers separated by air or other fluid
B42D 15/022
Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets: combined with permanently fastened sound-producing or…
B60R 11/0217
For radio sets, television sets, telephones, or the like; Arrangement of controls thereof: for loud-speakers
G06F 1/1601
Constructional details or arrangements: constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays

Family

Application08/707,012Parent of this continuation · filed 3 Sep 1996
Application09/978,663Parent of this division · filed 18 Oct 2001
US 2005/0147273 A1Pre-grant publication · published 7 Jul 2005
US 6,904,154 B2Parent of this division
US 6,332,029 B1Parent of this continuation
Application09/978,663Parent of this continuation
US 2002/0027999 A1Published application
US 7,158,647 B2This patent

From the US filing history. Foreign family members aren’t listed.