Method and apparatus for controlling material vibration...

Details Method and apparatus for controlling material vibration... Method and apparatus for controlling material vibration...

2006-10-18

2011-12-13

Ensey, Brian (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S423000

Reexamination Certificate

active

08077903

ABSTRACT:
A method for reducing the radiation amplitude of material vibration modes (division vibrations) from a loudspeaker transducer diaphragm mechanically vibrated for the purpose of transforming an electrical signal into an acoustic signal. The diaphragm material may consist of formed paper or plastic sheet materials or molded paper pulp. The amplitude reduction of material vibration modes and pressure waves within the diaphragm material is accomplished by impressing small, shaped structures within the diaphragm material at critical locations determined by measurement with laser vibration analysis or position sensitive transient analysis of a loudspeaker transducer. The method is applied to the diaphragm material after it has been formed into the shape of a loudspeaker transducer diaphragm, either before or after the diaphragm has been assembled into a loudspeaker transducer.

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Mark McKenzie, “Remaking Tang Band's W3-881S,” AudioXpress, Dec. 2004, pp. 54-62, 35-12, Audio Amateur Corp, Peterborough.

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