Microphone Isolation Chamber Layout for Thermal Interference
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Solution Overview
Problem
Existing microphones suffer from performance degradation due to thermal interference caused by heat generated by ASIC chips, which affects the transducers and other functional components.
Innovation Solution
The microphone design incorporates baffles to divide the receiving space into isolation chambers, with adhesive strips bonding baffles to the circuit board and housing, and uses a metal housing for electromagnetic shielding, isolating functional components with different functions in separate chambers to prevent heat exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple functional components are integrated in the same receiving space, then device complexity is reduced, but thermal interference occurs affecting transducer performance
Solution Approach 1:
The receiving space is divided into multiple isolated chambers using baffles, separating functional components with different thermal characteristics. Each chamber houses specific components (e.g., ASIC chips in one chamber, transducers in another), preventing heat transfer between them while maintaining an integrated device structure.
2Volume of moving object
If ASIC chips are placed close to transducers for compact design, then device volume is reduced, but heat generated by ASIC chips degrades transducer performance
Solution Approach 1:
Baffles create separate chambers within the compact device volume, allowing ASIC chips and transducers to be positioned close together spatially while thermally isolating them. This segmentation enables compact design without compromising transducer performance stability.
Solution Approach 2:
The baffles act as thermal intermediaries or barriers between heat-generating ASIC chips and heat-sensitive transducers. These baffles block heat transfer paths while allowing the device to maintain a compact form factor.
3Manufacturing precision
If functional components are arranged in a shared cavity, then manufacturing precision requirements are reduced, but thermal movement of air causes performance degradation
Solution Approach 1:
The shared cavity is segmented into multiple isolated chambers using baffles, preventing thermal air movement between components. This segmentation maintains relaxed manufacturing precision requirements while ensuring consistent transducer performance by isolating each component's thermal environment.
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 prevents thermal interference, maintaining stable performance by isolating components and enhancing heat dissipation through sound holes, thus improving connection quality.
Implementation Method 1
the plurality of baffles is configured to divide the receiving space into a plurality of isolation chambers; at least two selected functional components has different functions; each isolation chamber is provided to receive at least one functional component; the functional components with different function are isolated in different isolation chambers
Implementation Method 2
a plurality of first adhesive strips is bonded to a surface of the circuit board facing the receiving space; each first adhesive strip is bonded to one corresponding baffle; a plurality of second adhesive strips is bonded to a surface of the housing facing the receiving space; each second adhesive strip is bonded to one corresponding baffle
Implementation Method 3
the housing is made of metal capable of electromagnetic shielding; the housing and the baffles are made of identical metal
Data Source
AI summary
The present disclosure discloses a microphone including: a circuit board; a housing engaged with the circuit board for enclosing a receiving space; a plurality of functional components located in the receiving space and electrically connected with the circuit board; and a plurality of baffles received in the receiving space and arranged at intervals along a direction parallel with a plane the circuit board located; the plurality of baffles is configured to divide the receiving space into a plurality of isolation chambers; at least two selected functional components has different functions; each isolation chamber is provided to receive at least one functional component; the functional components with different function are isolated in different isolation chambers. The microphone in the present disclosure has stable performance.