Capacitive microphone diaphragm, microphone and production method thereof

Abstract

The invention discloses a capacitive microphone diaphragm, a microphone and a production method thereof; the capacitive microphone diaphragm comprises a diaphragm and a metal film layer which is plated on the upper surface of the diaphragm. The capacitive microphone diaphragm is characterized in that a plurality of grooves are uniformly formed in the upper surface and / or the lower surface of the diaphragm; the diaphragm at the groove is a first diaphragm, the diaphragm at the periphery of the groove is a second diaphragm, and the thickness of the first diaphragm is smaller than that of the second diaphragm; the diaphragm, the microphone and the method have the advantage that the initial stress of the diaphragm is reduced, so that the whole vibration system has abundant elasticity during energy conversion; the induction of the diaphragm to the subtle sound is enhanced, the sensitivity of the diaphragm to the sound is increased, and the tone of sound input is finally improved; meanwhile,due to the fact that the tightening degree of the diaphragm is reduced, the service life and the reliability of the microphone are improved.

Description

technical field [0001] The invention relates to the field of electroacoustic equipment, in particular to a condenser microphone diaphragm, a microphone and a production method. Background technique [0002] Microphones, also known as microphones, can be divided into dynamic microphones, condenser microphones and ribbon microphones according to their working principles. Condenser microphones use a very thin metal diaphragm as the first stage of the capacitor, and another very close metal back plate (about a few tenths of a millimeter) as the other pole, so that the vibration of the diaphragm will cause changes in the capacitance to form electric signal. Because the diaphragm is very thin, even a very small sound can make it vibrate, so the condenser microphone is very sensitive. The biggest feature of the condenser microphone is its high sensitivity, rich details, and a flat and wide frequency response curve. [0003] The conventional diaphragm adopts a flat plate structure...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the existing technology are: 1. The diaphragm ring fixes the diaphragm so that it is in a tensioned state. When the diaphragm is excited by sound pressure during the transduction process, the end of the diaphragm cannot produce substantial displacement, and only the central part of the diaphragm is relatively small. The small area can contribute to the energy conversion, so it limits the energy conversion efficiency, reduces the sensitivity of the microphone, and reduces the timbre; 2. The initial stress of the diaphragm is very high, which limits the dynamic response level of the microphone and causes distortion, especially in When used for high-quality sound pickup, the weak harmonic information other than the fundamental frequency in the sound wave cannot respond, and the sound quality cannot achieve the best effect; 3. The permanent tension of the diaphragm will lead to diaphragm fatigue, which will affect the service life and reliability

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