Frequency response adjustable miniature sound pressure amplification structure

Abstract

The invention provides a frequency response adjustable miniature sound pressure amplification structure which comprises a shell (1), a plurality of primary sensitive membranes (2), a plurality of connecting rods (3), a plurality of secondary sensitive membranes (4) and a terminal sensitive membrane (5), and the shell is of a rigid structure and comprises two cavity structures; the plurality of primary sensitive membranes are used as receiving ends of sound pressure signals and are fixed on the upper surface frame of the shell (1) to form a first boundary condition of peripheral fixed support; the plurality of connecting rods are respectively connected with the centers of the plurality of primary sensitive membranes and the plurality of secondary sensitive membranes, so that the primary sensitive membranes and the secondary sensitive membranes move together under the action of sound pressure; the plurality of primary sensitive membranes, the plurality of secondary sensitive membranes and the shell jointly form a first sealing cavity; a plurality of secondary sensitive membranes are fixed on the frame in the shell to form the second boundary condition of the peripheral fixed support, and form the second sealing cavity with the terminal sensitive membrane and the shell; and the terminal sensitive membranes serving as the amplification end of thea sound pressure signal is fixed on the lower surface of the shell to form a third boundary condition of the peripheral fixed support.

Description

technical field [0001] The invention relates to the technical field of sound pressure sensing, in particular to a micro sound pressure amplification structure with adjustable frequency response. Background technique [0002] With the rapid development of information technology, high-sensitivity weak acoustic signal detection has become the focus of research at home and abroad. Moreover, in recent years, the research focus of sound pressure sensors has also developed from electroacoustic sensing technology to optical fiber sound pressure sensing technology. For example, the optical fiber acoustic pressure sensor is a kind of acoustic sensor that uses optical fiber as the light transmission medium or detection unit. Compared with the traditional electroacoustic sensor, it has the advantages of high sensitivity, wide frequency band response, and anti-electromagnetic interference. National defense security, industrial non-destructive testing, medical diagnosis and consumer elec...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the existing single sensor probe, referring to the unique physiological structure and sound pressure amplification characteristics of the human ear, designing a sound pressure amplification structure with adjustable frequency response, through the connection with the sound pressure sensor , realize the amplification and sensitization of sound pressure in an adjustable frequency range, so as to effectively improve its sound pressure sensitivity in a wide and adjustable frequency range, which has important practical significance and application for the realization of high sensitivity of sound pressure sensors value

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