Diaphragm perforating type piezoelectric flat speaker

Abstract

The invention belongs to the technical field of speakers, particularly relating to a thin piezoelectric speaker with a novel diaphragm structure. The structure of the speaker comprises a diaphragm, a piezoelectric ceramic wafer, an electrode, an electrode leading wire and a edge frame, wherein the piezoelectric ceramic wafer is adhered on the diaphragm; the electrode is arranged on the surface ofthe piezoelectric ceramic wafer; the electrode leading wire is connected with the electrode and an outer circuit; and the edge frame is used for restricting the diaphragm. The characteristics of the medium and low frequency section of the piezoelectric speaker are regulated through introducing single holes, single hole arrays, multiple holes, multiple hole arrays and porous symmetrical structureson the rectangular or round diaphragm, thus the distortion rate is reduced; the phase cancellation of medium-frequency range sound irradiation in space is lowered or eliminated; the evenness of the acoustic pressure level frequency response curve of the piezoelectric speaker is greatly improved; even if the acoustic pressure level at the distortion position is improved by above 25db, which is generated by the fact that the voltage applied on the frequency bandwidth of the distortion position is improved by 17 times, so that the sound quality of the piezoelectric speaker is better; and in addition, the rigidity and quality distribution of the diaphragm are improved, thus the output of the acoustic pressure of the speaker at the medium frequency range is obviously increased.

Description

technical field [0001] The invention relates to a novel piezoelectric loudspeaker, more specifically, to a piezoelectric flat-panel loudspeaker with a diaphragm perforated structure. Background technique [0002] The loudspeaker is an electric-force-acoustic transducer, which is an important component in audio equipment. Loudspeakers are widely used in people's daily life and bring a lot of convenience. In the fields of electronic products such as automobiles, radio, TV, speakers, mobile phones, MP4, computers, etc., the applications of loudspeakers can be seen almost everywhere. There are many types of loudspeakers, which can be divided into electric type (ie moving coil type), electrostatic type (ie capacitive type), electromagnetic type (ie reed type), piezoelectric type, etc. according to their energy conversion principles; Divided into woofers, midrange speakers, and tweeters, among which dynamic speakers are the most widely used. Due to its small size, thinness and l...

AI Technical Summary

Problems solved by technology

Moving the mid-frequency valley back often starts with the structure, size, etc., and the impact of structure, size and other parameters on the performance of the speaker is multifaceted. It is difficult to take care of other adjusted performance indicators while pushing the mid-frequency valley back. , it is often necessary to break the existing design, and it is very difficult to simply push the mid-frequency valley back a few thousand Hz

In terms of reducing or even eliminating the mid-frequency valley at the current frequency, the industry has never had a simple and general method, which has become a problem and bottleneck restricting the popularization and application of piezoelectric speakers.

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