Collapsible image derived differential microphone

An acoustic signal receiving apparatus comprises a housing (21,22) having an acoustically reflecting surface (22) and a directional acoustic sensor unit (23) having first-order gradient characteristics. The sensor unit (23) is coupled to the housing with use of a retractable member having a retracte...

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Bibliographic Details
Main Authors WEST, JAMES EDWARD, KUBLI, ROBERT ALFRED
Format Patent
LanguageEnglish
French
German
Published 03.09.2008
Subjects
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
CALCULATING
COMPUTING
COUNTING
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
PUBLIC ADDRESS SYSTEMS
SOUND-PRODUCING DEVICES
TELEPHONIC COMMUNICATION
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Summary:An acoustic signal receiving apparatus comprises a housing (21,22) having an acoustically reflecting surface (22) and a directional acoustic sensor unit (23) having first-order gradient characteristics. The sensor unit (23) is coupled to the housing with use of a retractable member having a retracted position and an extended position. When the member is extended, the sensor unit is positioned relative to the reflecting surface such that the acoustic interaction between the sensor unit and the reflecting surface causes the output of the sensor unit to have second-order gradient response characteristics. In accordance with one illustrative embodiment, in a notebook computer with a "flip-back" lid (22), the sensor element (23) automatically extends to the desired position when the lid is opened, and automatically retracts to be flush with the housing surface when the lid is closed.
Bibliography:Application Number: EP19960308810