Wearable Microphone Chamber Layout for Noise-Isolated Sound Pickup
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Solution Overview
Problem
Existing wearable electronic devices face challenges in optimizing the arrangement and functionality of sound-related components like microphones and speakers, particularly in compact designs, which can lead to noise interference and reduced sound quality.
Innovation Solution
A wearable electronic device design featuring a housing with an opening, a chamber, a speaker outputting sound through a port spaced from the opening, a grill, and a microphone with a hole connected to the chamber, where the chamber's first surface is convexly formed towards the opening to enhance sound reception and noise cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the microphone is placed close to the opening for better sound reception, then sound quality improves, but external noise interference increases
Solution Approach 1:
The chamber acts as an intermediary space between the opening and the microphone. Sound waves from outside enter the chamber first, then propagate to the microphone through the hole in the convex surface. This intermediate chamber structure allows sound to be received while providing acoustic isolation that reduces direct noise interference, thus resolving the contradiction between sound reception quality and noise interference.
Solution Approach 2:
The convex surface of the chamber creates a curved acoustic path for sound waves entering the chamber. This curvature helps to diffuse and redirect sound waves toward the microphone hole while providing acoustic shielding that reduces the direct impact of external noise on the microphone, thereby improving sound reception quality while minimizing noise interference.
2Volume of moving object
If the speaker and microphone are placed close together to save space, then device compactness improves, but noise interference between components increases
Solution Approach 1:
The chamber is segmented into two functional zones: an outer region facing the opening for sound intake, and an inner region containing the hole that directs sound to the microphone. This segmentation creates acoustic separation within the compact structure, allowing the speaker and microphone to be positioned close together while minimizing their mutual interference through the chamber's acoustic design.
3Measurement precision
If the opening is made larger for better sound intake, then sound reception improves, but noise entry increases
Solution Approach 1:
The chamber structure provides different acoustic properties at different locations: the opening area allows broad sound intake, while the convex inner surface with its hole creates a focused acoustic path that preferentially directs desired sound to the microphone. This local differentiation of acoustic quality allows the opening to be effective for sound intake while the chamber structure filters out excessive noise.
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 improves sound quality and reduces noise interference by directing sound effectively into the microphone and minimizing external noise entry, enhancing user experience in compact wearable devices.
Implementation Method 1
a microphone in which a microphone hole connected to the space of the chamber is formed. The chamber includes a first surface, which is located between the space of the chamber and the microphone hole and is at least partially formed convexly toward the opening
Data Source
Figure 1
Figure 2
Figure 3A~3b
AI summary
The present disclosure relates to a wearable electronic device. The wearable electronic device according to an embodiment of the present disclosure comprises: a housing having an opening formed in the surface thereof and comprising a chamber which forms a space facing the opening; a speaker disposed in the housing and outputting sound toward a port which is disposed at a position spaced apart from the opening; a grill disposed in the opening; and a microphone which is formed to receive sound from outside the housing, wherein the chamber may comprise: a first surface which is formed to be at least partially convex toward the opening; and a hole which is formed in the first surface and connects the space in the chamber to the microphone.