Capacity sound-transmitter vibration diaphragm and its capacity sound transmitter

Abstract

The invention comprises a membrane; coating a metal film on said membrane; the center part of the membrane is a transducing capacitor, and on the edge of the membrane are more than one bulged rings used for suspending and supporting the transducing capacitor; by the bulged rings used for suspending and supporting the transducing capacitor in the center, the initial stress of the membrane can be greatly reduced , and the vibrating system has more elasticity; by the metal film coated on the membrane, the rigidity of the membrane surface is enhanced.

Description

technical field [0001] The invention relates to a diaphragm of a condenser microphone and a microphone thereof. Background technique [0002] Existing condenser microphones include three forms, namely the externally polarized voltage condenser microphone, the diaphragm electret condenser microphone and the back pole electret condenser microphone. Regardless of the type of condenser microphone, they have at least a transducing capacitor consisting of a diaphragm and a back plate. [0003] At present, the diaphragm of the condenser microphone is usually a diaphragm with a flat structure, as shown in Figure 1 and Figure 5. Its structure is to use a diaphragm ring to tightly wrap a metal foil or a plastic film coated with a metal conductive layer. Stretch, and then use glue, clamp or other methods to tightly fix the diaphragm on the stretching ring. Since the diaphragm works under permanent tension, there are several problems. First, the initial stress of the diaphragm is very...

AI Technical Summary

Problems solved by technology

Since the diaphragm works under permanent tension, there are several problems. First, the initial stress of the diaphragm is very high, which limits the response level of the dynamic lower limit of the microphone and causes distortion, especially when used as a high-quality When picking up sound, the weak harmonic information other than the fundamental frequency in the sound wave cannot respond; secondly, due to the clamping effect of the diaphragm ring on the diaphragm, the end of the diaphragm cannot produce substantial vibration when the diaphragm is excited by sound pressure during the transduction process. Due to the permanent displacement, only a small area in the central part of the diaphragm contributes to the energy conversion, thus limiting the efficiency of the energy conversion and the improvement of the sensitivity of the microphone; third, the permanent tension of the diaphragm will cause the fatigue of the diaphragm and affect the Microphone lifetime and reliability

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