Patent ID: 6219304
Filing Date: 2001-04-17
Classification: G04B,G04C,G10K

Abstract:
A portable water resistant device capable of undergoing submersion to a predetermined depth in a liquid, including a case in which is mounted an acoustic transducer so as to communicate in a water tight manner with an exterior of the case via acoustic energy, whereinsaid acoustic transducer is mounted in said case facing, and spaced from, a deformable membrane, said deformable membrane separating said acoustic transducer in a water tight maimer from an inlet cavity disposed in said case and in direct communication with the exterior of the case, and wherein between said deformable membrane and said acoustic transducer an intermediate chamber is arranged, allowing deformation of said deformable membrane by the action of static pressure external of said case and delimited on a side thereof facing said transducer by a support element fixedly mounted in said case and capable of limiting the deformation of said deformable membrane in the event of application of said static pressure and a spacing means disposed between said membrane and said support element, said spacing means determining internally the volume of said intermediate chamber.