Microphone Housing Vibration Isolation with Holder-Routed Wiring
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Solution Overview
Problem
Conventional wireless microphones suffer from noise propagation due to vibrations and creaking sounds caused by user interactions with the housing, which are transmitted through the wiring and recorded as mechanical noises.
Innovation Solution
The microphone apparatus is designed with a housing that houses the microphone element, wiring, and electronic substrates in a manner that minimizes direct contact between the wiring and the housing, using elastic members and strategic positioning to absorb and disperse forces, thereby reducing noise propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiring directly connects the microphone element to the housing, then the electrical connection is simple and reliable, but vibrations and creaking sounds from the housing are transmitted through the wiring and recorded as noise
Solution Approach 1:
The patent introduces a holder as an intermediary component that supports the wiring inside the housing. The wiring is routed through the holder rather than directly contacting the housing, creating a mechanical decoupling that prevents vibration transmission while maintaining electrical connectivity. The holder acts as a buffer that isolates the sensitive wiring from the noisy housing structure.
Solution Approach 2:
The patent segments the wiring path into distinct sections: the wiring extends from the microphone element, is supported by the holder at intermediate points, and connects to the detection circuit. This segmentation allows the wiring to be mechanically isolated from the housing in critical sections while maintaining electrical continuity, thereby reducing noise propagation along the signal path.
2Ease of manufacture
If the MEMS capacitor and detection circuit are disposed on non-adjacent sides, then the wiring path is longer providing more space for routing, but the wiring is more exposed to vibrations and creaking sounds from the housing
Solution Approach 1:
The holder serves as a mediating structure that provides designated pathways for the wiring to traverse the housing interior. Rather than allowing the wiring to freely traverse the entire distance between non-adjacent sides, the holder creates controlled routing paths that minimize exposure to vibration sources while maintaining the beneficial spatial separation of components.
3Strength
If force is applied to the housing, then the housing structure is tested for strength, but creaking sounds are generated and transmitted through the wiring to the microphone element
Solution Approach 1:
The holder acts as a vibration-isolating intermediary between the housing and the wiring. When force is applied to the housing, the holder absorbs and dampens the resulting vibrations and creaking sounds, preventing them from being transmitted to the wiring and subsequently to the microphone element. This mechanical buffering protects the sensitive audio signal from structural noise.
Solution Approach 2:
The holder provides preemptive vibration cushioning by being positioned along the wiring path in advance. Before vibrations from housing deformation can reach the wiring, the holder intercepts and attenuates these vibrations, effectively cushioning the wiring against noise generation even before force is applied to the housing.
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 effectively suppresses noise generation by increasing the force transmission path and using rigid materials to absorb vibrations, resulting in reduced mechanical noise recording.
Implementation Method 1
using elastic members and strategic positioning to absorb and disperse forces
Data Source
AI summary
A microphone apparatus includes a microphone element, a wiring, a first member, a second member, a holder, and a housing. The microphone element, the wiring, the first member, the second member, and the holder are disposed inside the housing. The holder holds at least one of the first member and the second member. The wiring electrically connects the microphone element to at least one of the first member and the second member. At least a part of the wiring is housed in space formed by the holder, the first member, and the second member.