Collapsible image derived differential microphone

H - Electricity – 04 – R

Patent

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Details

H04R 1/02 (2006.01) G06F 3/16 (2006.01) H04R 1/32 (2006.01) H04R 1/40 (2006.01)

Patent

CA 2190665

An acoustic signal receiving apparatus comprising a housing having an acoustically reflecting surface and a directional acoustic sensor unit having first-order gradient characteristics. The sensor unit 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, the sensor element 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.

L'invention est un appareil récepteur de signaux acoustiques comportant un boîtier ayant une surface acoustiquement réfléchissante et un capteur acoustique directif à gradient du premier ordre. Ce capteur est couplé au boîtier au moyen d'un élément rétractable ayant une position de retrait et une position d'extension. Quand l'élément est en position d'extension, le capteur est placé par rapport à la surface réfléchissant de telle façon que, sous l'effet de l'interaction entre lui-même et cette surface, son signal de sortie a une caractéristique de réponse à gradient du second ordre. Dans l'une des concrétisations illustrant l'invention, un ordinateur bloc-notes doté d'un volet mobile, l'élément capteur s'étend automatiquement jusqu'à la position désirée quand le volet est ouvert et se rétracte automatiquement pour se placer à égalité avec la surface du boîtier quand le volet est fermé.

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