MEMS loudspeaker

A loudspeaker, sound-transmitting technology, applied in microphones, electrostatic transducers, microphones, sensors, etc., can solve problems such as hindering the transmission of external sound

Active Publication Date: 2019-09-06
GEER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the form of a speaker, it is difficult to hear only yourself in the direction of sound transmission without disturbing the people around you; in the form of earplugs, it will prevent the external sound from being transmitted to the user, affecting the use

Method used

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  • MEMS loudspeaker
  • MEMS loudspeaker
  • MEMS loudspeaker

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0024] Depend on figure 1 and figure 2 It can be seen that the MEMS speaker includes a housing 10a, an annular groove 11 is formed on the housing 10a, a sound-transmitting channel 12a extending along the axial direction of the annular groove 11 is provided on the housing 10a, and a cover is arranged on the annular groove 11. The piezoelectric diaphragm 20a on the notch.

[0025] The MEMS speaker is electrically connected with the electronic product, and the piezoelectric diaphragm 20a can vibrate correspondingly through the change of the voltage signal to emit sound. When in use, since the piezoelectric diaphragm 20a is facing the user's ear, the sound from the MEMS speaker can be directly transmitted to the user's ear, which can reduce the sound from spreading around and disturbing people around; at the same time, on the MEMS speaker A sound-transmitting channel 12a is provided for transmitting external sound to the user's ear, and the external sound can be transmitted to ...

no. 2 example

[0033] Depend on image 3 It can be seen that this embodiment is basically the same as the first embodiment, the differences are:

[0034] The housing 10b is in the shape of an oval ring, the ring groove 11 and the piezoelectric diaphragm 20b are correspondingly arranged in the shape of an oval ring, and the sound transmission channel 12b is in the shape of an oval hole. Generally, the long axial dimension A2 of the outer periphery of the MEMS speaker is greater than or equal to 6mm and less than or equal to 30mm, the short axial dimension A1 of the outer periphery of the MEMS speaker is greater than or equal to 3mm and less than or equal to 15mm, and the axial thickness H of the MEMS speaker is greater than or equal to 1mm and less than or equal to 5mm, sound transparent The long axial dimension B2 of the channel 12b is greater than or equal to 3mm and less than or equal to 15mm, and the short axial dimension B1 of the sound-transmitting channel 12a is greater than or equal t...

no. 3 example

[0036] Depend on Figure 4 It can be seen that this embodiment is basically the same as the first embodiment, the differences are:

[0037]The housing 10c is in the shape of a square ring, the ring groove 11 and the piezoelectric diaphragm 20c are correspondingly arranged in a square ring shape, and the sound-transmitting channel 12c is in the shape of a square hole. Usually, the side length C2 of the outer circumference of the MEMS speaker is greater than or equal to 5 mm and less than or equal to 30 mm, the axial thickness H of the MEMS speaker is greater than or equal to 1 mm and less than or equal to 5 mm, and the side length dimension C1 of the sound-transmitting channel 12c is greater than or equal to 1 mm and less than or equal to 15 mm.

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Abstract

The invention belongs to the technical field of electroacoustic products, and particularly relates to an MEMS loudspeaker which comprises a shell, an annular groove is formed in the shell in a surrounding mode, a sound transmission channel extending in the axis direction of the annular groove is arranged on the shell, and the MEMS loudspeaker further comprises a piezoelectric vibrating diaphragm arranged on a groove opening of the annular groove in a covering mode. The MEMS loudspeaker is electrically connected with the electronic product. Through the change of the voltage signal, the piezoelectric vibrating diaphragm can generate corresponding vibration so as to make a sound. When in use, the piezoelectric vibrating diaphragm is over against the ear of a user, the sound generated by the MEMS loudspeaker can be directly transmitted to the ear of a user, and the situation that sound diffuses all around and disturbs people around can be reduced. The MEMS loudspeaker is provided with a sound transmission channel used for transmitting external sound to the ears of the user. According to the embodiment of the invention, the MEMS loudspeaker can ensure that the sound emitted by the MEMSloudspeaker can be directly transmitted to the ear of the user without interfering surrounding people, and the external sound cannot be hindered from being transmitted to the ear of the user.

Description

technical field [0001] The invention belongs to the technical field of electroacoustic products, and in particular relates to a MEMS loudspeaker. Background technique [0002] The speaker is an electroacoustic transducer. With the development of technology, MEMS speakers are gradually applied to electronic products. MEMS is the abbreviation of Micro-Electro-Mechanical System, that is, micro-electromechanical system. [0003] At present, the audio playback function is realized by setting speakers or earplugs on AR products and VR products, and the speakers are components that emit sound from the speakers or earplugs. When using the form of a speaker, it is difficult to hear only yourself in the direction of sound transmission without disturbing the people around you; when using the form of earplugs, it will hinder the transmission of external sound to the user and affect the use. Contents of the invention [0004] The purpose of the present invention is to provide a MEMS s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/04
CPCH04R19/04H04R2201/003
Inventor 李进保张金国姜滨迟小羽
Owner GEER TECH CO LTD
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