Multi-Microphone Sound Isolation via Segmented Housing
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Solution Overview
Problem
In voice-recognition-based platforms, sound can escape between the spaces of multiple microphones, disrupting accurate voice and direction recognition.
Innovation Solution
The design of an electronic device with multiple microphones includes specific structural features such as support members and sound-permeable members to prevent sound from escaping between microphone paths, ensuring that sound is directed to each microphone accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple microphones are used for voice recognition, then voice recognition accuracy is improved, but sound escapes between microphone spaces causing interference
Solution Approach 1:
The housing is divided into multiple sound introduction spaces, with each space dedicated to a specific microphone. Partition walls separate these spaces to prevent sound from escaping between microphones, ensuring each microphone receives sound only from its designated direction and space.
Solution Approach 2:
Each sound introduction space is optimized for its specific microphone with tailored acoustic characteristics. The partition walls create localized acoustic environments that enhance the performance of individual microphones while preventing cross-interference.
2Device complexity
If sound introduction spaces are shared between microphones, then device complexity is reduced, but sound interference occurs between microphones
Solution Approach 1:
Rather than using a single shared space, the housing is segmented into multiple dedicated sound introduction spaces. Each space is assigned to a specific microphone, eliminating the need for complex acoustic management in shared spaces while maintaining structural simplicity through the use of partition walls.
3Object-affected harmful factors
If partition walls are added to separate sound spaces, then sound interference is prevented, but device complexity increases
Solution Approach 1:
The partition walls are integrated into the housing structure itself, combining the functions of sound isolation with the structural framework. This merging approach prevents sound interference while avoiding the addition of separate, complex isolation components.
Solution Approach 2:
The partition walls serve multiple functions: they structurally define the housing, create sound isolation barriers, and establish the geometric configuration of sound introduction spaces. This multi-functionality reduces overall device complexity despite the added sound isolation capability.
Data Source
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AI summary
According to an embodiment of the present invention, an electronic device may comprise: a housing; a printed circuit board disposed inside the housing, the printed circuit board comprising a first surface, a second surface facing away from the first surface, and a first through-hole and a second through-hole penetrating the first surface and the second surface; a first microphone disposed on the second surface so as to at least partially overlap the first through-hole when seen from above the first surface; a second microphone disposed on the second surface so as to at least partially overlap the second through-hole when seen from above the first surface; a support member disposed on the first surface, the support member comprising a third surface facing the first surface, a fourth surface facing away from the third surface, a third through-hole at least partially overlapping the first through-hole when seen from above the first surface, and a fourth through-hole at least partially overlapping the second through-hole when seen from above the first surface; a first sound-transmitting member disposed on the fourth surface so as to at least partially overlap the third through-hole; and a second sound-transmitting member disposed on the fourth surface so as to at least partially overlap the fourth through-hole. Various other embodiments may be included.