Double-back-pole push-pull output electret capacitor microphone
By designing a double-back pole push-pull output electret capacitor microphone, the combined action of the two capacitors is used to solve the problem of insufficient sensitivity and output signal strength in the prior art, and higher sensitivity and stronger output signals are achieved.
CN222655323UActive Publication Date: 2025-03-21SHENZHEN XINHOUTAI PLASTIC ELECTRONICS
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Patent Information
- Application Number
- CN202420902122.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-28
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-04-28
AI Technical Summary
Technical Problem
Existing electret capacitive microphones have challenges in improving sensitivity and output signal strength.
Method used
A dual-back pole type push-pull output electret capacitor microphone is designed, and its electrode head is composed of the upper back pole, the lower back pole and the diaphragm. The two capacitors work together to enhance the signal.
Benefits of technology
It effectively improves the sensitivity and output signal strength of the microphone, and uses the characteristics of the dual-back pole push-pull output to enhance the signal.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model discloses a double-back-pole push-pull output electret capacitor microphone, which comprises a pole head, and is characterized in that the pole head comprises an upper back pole, a lower back pole and a vibrating diaphragm arranged between the upper back pole and the lower back pole; a first gap is formed between the upper back pole and the vibrating diaphragm, and a second gap is formed between the lower back pole and the vibrating diaphragm; a first electret film layer is arranged on the lower surface of the upper back electrode, and a second electret film layer is arranged on the upper surface of the lower back electrode; the upper surface and the lower surface of the vibrating diaphragm are respectively provided with a metal layer. The upper back pole is provided with a sound inlet hole, and the lower back pole is provided with a sound balance hole. According to the electret capacitor microphone, the sensitivity is higher, and the output signal is stronger.
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