Capacitance-type microphone of micro-computer

Abstract

The invention provides a capacitance-type microphone of a micro-computer, which comprises a circuit board, an upper cover, a transducer and a control circuit, wherein the upper cover covers the circuit board and is provided with a containing chamber; the transducer and the control circuit are arranged on the circuit board respectively; the upper cover is provided with an upper surface, a lower surface ,a first sound inlet, a second sound inlet and a connecting channel, wherein the lower surface is opposite to the upper surface; the first sound inlet extends from the upper surface of the uppercover to the lower surface and does not penetrate the lower surface; the second sound inlet extends from the lower surface of the upper cover to the upper surface, does not penetrate the upper surface and is at a certain distance in transverse direction away from the first sound inlet; and the connecting channel is arranged between the upper surface and the lower surface of the upper cover and isconnected with the first sound inlet and the second sound inlet simultaneously. The capacitance-type microphone of the micro-computer is also provided with a waterproof material that is arranged in the connecting passage. The waterproof material arranged in the connecting passage reduces the water risk, reduces the area of the sound inlet simultaneously and increases the stability of the capacitance-type microphone of the micro-computer.

Description

【Technical field】 [0001] The invention relates to a microphone, in particular to a microcomputer condenser microphone. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is more important. The microphone of a mobile phone is used as a voice pick-up device for the mobile phone, and its design directly affects the call quality. [0003] Such as figure 1 As shown, the microcomputer condenser microphone 100' of the related art includes: a circuit board 14', an upper cover 20' covering the circuit board 14', a cavity 15' jointly formed by the circuit board 14' and the upper cover 20', a housing In the cavity 15', the transducer 12' and the control circuit 16'...

AI Technical Summary

Problems solved by technology

[0004] The microcomputer condenser microphone 100' of the related art only relies on a layer of waterproof material 18' for waterproofing, which has risks.

[0005] In addition, in the drop test, it was found that if the diameter of the sound inlet 21' is too large, the life of the transducer 12' will be affected during the drop process, so the customer requires that the diameter of the sound inlet 21' should be as small as possible. However, currently The diameter of the sound inlet hole 21' cannot be reduced from the design

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