Vacuum Cavity Microphone Reducing Air Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microphones suffer from background noise and reduced Q value due to air damping in their acoustic cavities, as the acoustic-electric conversion component rubs against gas, leading to decreased sound quality.
Innovation Solution
A microphone design featuring a shell structure with a vibration pickup portion and acoustic-electric conversion component housed in a vacuum cavity, where the vibration transmission and pickup portions form the vacuum cavity, minimizing air interaction and damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the acoustic cavity is filled with gas (air) for normal operation, then the microphone can transmit sound signals, but the acoustic-electric conversion component rubs against the gas causing air damping that reduces the Q value
Solution Approach 1:
The patent extracts the harmful element (gas/air) from the acoustic cavity by creating a vacuum environment. The acoustic-electric conversion component is placed in a vacuum cavity formed by the vibration pickup portion and shell structure, eliminating the gas that causes air damping and Q value reduction while still allowing sound signal transmission through the vacuum interface.
2Reliability
If the acoustic cavity contains gas for sound transmission, then the microphone functions normally, but background noise increases due to gas interaction with the acoustic-electric conversion component
Solution Approach 1:
The patent creates an inert environment (vacuum) in the acoustic cavity where the acoustic-electric conversion component operates. By removing the reactive gas molecules that cause noise through interaction with the moving component, the vacuum cavity eliminates background noise while maintaining the microphone's ability to transmit sound signals through the vacuum interface.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design significantly reduces background noise and improves the Q value by eliminating air damping, resulting in enhanced sound quality and performance.
Implementation Method 1
the vibration transmission portion and at least a portion of vibration pickup portion may form a vacuum cavity, and the acoustic-electric conversion component may be located in the vacuum cavity
Data Source
AI summary
The present disclosure may provide a microphone. The microphone may include: a shell structure and a vibration pickup portion, wherein the vibration pickup portion may generate vibration in response to vibration of the shell structure; the vibration transmission portion may be configured to transmit the vibration generated by the vibration pickup portion; and an acoustic-electric conversion component configured to receive the vibration transmitted by the vibration transmission portion to generate an electrical signal, wherein the vibration transmission portion and at least a portion of vibration pickup portion may form a vacuum cavity, and the acoustic-electric conversion component may be located in the vacuum cavity.