Improved Low Frequency Acoustic Transducer (ACOUSTIC TRANSDUCER WITH IMPROVED LOW FREQUENCY RESPONSE)

摘要

The acoustic transducer 10 of the present invention comprises a porous member 12; A movable partition (16) movable at regular intervals from the porous member (12); Spring means (54,56, 58,60) interconnecting said diaphragm (16) and said porous member (12) to movably support said diaphragm (16) relative to said porous member (12); Includes a pressure equalization slot (26) that controls the flow of fluid through the diaphragm (16), the pressure equalization slot (26) equalizing pressure on both sides of the diaphragm (16) to define a low frequency response; (12) and said diaphragm (16) to generate an output signal indicative of a change in capacitance induced by a change in the space between said porous member (12) and said diaphragm (16) And an electric field application means.