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Speaker system coupled by low and high sounds of piezoelectric materials and sound vibration device

A technology of sound vibration and piezoelectric material, applied in the field of speaker system, can solve the problems of low sound pressure output, poor sound quality, high harmonic distortion, and achieve the effect of optimized sound quality, low cost, and small external magnetic interference

Inactive Publication Date: 2012-12-12
KINGTONE INNOVATION BEIJING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the sound pressure frequency response curve of the existing piezoelectric flat-panel speakers generally has sharp fluctuations in the mid-frequency band, resulting in high harmonic distortion and poor sound quality. Relatively speaking, the mid-frequency band of the dynamic speaker is much flatter.
In addition, the average sound pressure output of a piezoelectric flat panel speaker based on a single ceramic sheet is generally lower than that of a dynamic speaker of the same size

Method used

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  • Speaker system coupled by low and high sounds of piezoelectric materials and sound vibration device
  • Speaker system coupled by low and high sounds of piezoelectric materials and sound vibration device
  • Speaker system coupled by low and high sounds of piezoelectric materials and sound vibration device

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Fig. 1 (A) and Fig. 1 (B) are the sectional view and the isometric side view along the symmetry plane of Embodiment 1 of the present invention, figure 2 The beneficial effect of Embodiment 1 of the present invention is introduced in the form of a sound pressure frequency response curve diagram. There is a hole in the center of the larger-sized vibrating membrane 1, and a ring structure 1a to improve the bass effect. The diaphragm material is a metal material including nickel-iron alloy, stainless steel, etc., or a polymer material including polyethylene naphthalate fiber (PEN), polyether ketone fiber (PEEK) and the like. The piezoelectric ceramic 2 is bonded to the bottom, which is used to drive the diaphragm 1 to vibrate, mainly for reproducing bass, and the position of the piezoelectric ceramic 2 can adjust the vibration mode of the diaphragm and optimize the sound quality. The shape of the piezoelectric ceramic 2 is a ring or four squares evenly distributed along th...

Embodiment 2

[0039] Fig. 3(A) and Fig. 3(B) are a sectional view and an isometric side view along the plane of symmetry of this embodiment. It differs from Embodiment 1 in that a small-sized piezoelectric speaker 6 is used to replace the small-sized moving coil speaker 3, so that the thickness of the rear cavity 4 can be reduced to no more than 3 millimeters, thereby further ensuring the speaker system of the present invention. The ultra-thin characteristics. Embodiment 2 can also be obtained with figure 2 Similar beneficial mid-bass coupling.

Embodiment 3

[0041]Fig. 4(A) and Fig. 4(B) are a sectional view and an isometric side view along the plane of symmetry of this embodiment. It differs from Embodiment 1 in that it adopts a multifunctional sounding vibration device 7 (MFD) to replace the small-sized moving coil loudspeaker 3 and piezoelectric ceramics 2. The principle and function of the MFD are not the essence of the present invention, so in This will not be described in detail. Among them, the sounding part 7a of the MFD can reproduce the middle and high tones, and the vibrating part of the MFD can drive the large-sized diaphragm 1 to reproduce the bass. This structural design is simpler and more compact without losing the beneficial effect of the present invention. Embodiment 3 can also be obtained with figure 2 Similar beneficial mid-bass coupling.

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Abstract

The invention belongs to the technical field of speakers, in particular to a speaker system coupled by low and high sounds of piezoelectric materials and a sounding vibration device. The structure of the system mainly comprises a large size diaphragm, piezoelectric ceramics or a multi-functional sounding vibration device for driving the diaphragm to vibrate, a small size speaker bonded at an opening position of the diaphragm and a casing for supporting the diaphragm and constituting a back cavity. Advantages of the small size speaker, the piezoelectric ceramics or the small size ultrathin multi-functional sounding vibration device are fully used. The defect of low sound outputs of a piezoelectric-driven speaker is overcome by the large size (aperture) diaphragm, the structure is simple, the cost is low, the outer magnetic interference is small, and a good sound of a full frequency domain is achieved by coupling the replay of middle and high sounds.

Description

technical field [0001] The invention belongs to the technical field of loudspeakers, and in particular relates to a loudspeaker system for high-low frequency coupling using piezoelectric materials or multifunctional sound-generating vibration devices. 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 spea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06H04R9/02
Inventor 张韬
Owner KINGTONE INNOVATION BEIJING TECH
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