Ear-Clip Earphone Gravity-Based Microphone Selection for Noise Reduction
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Solution Overview
Problem
Current ear-clip earphones struggle with inadequate sound pickup performance and noise reduction, particularly when worn on either the left or right ear, and lack a seamless interchange function.
Innovation Solution
The earphone design includes two first microphones with distinct sound entry holes positioned to collect sounds differently, a processing circuit to control microphone operation based on gravity, and a detection element to adjust microphone states for optimal noise reduction, ensuring consistent performance regardless of ear placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two first microphones are used to collect sound from different directions, then noise reduction capability is improved, but device complexity increases
Solution Approach 1:
The sound collection function is segmented into multiple microphones positioned at different locations (first microphones on the abutting portion, second microphone on the sound-producing portion). Each microphone captures sound from different directions, and the processing circuit selectively uses appropriate microphones based on wearing orientation to achieve noise reduction while managing system complexity through functional division.
Solution Approach 2:
The microphone system operates dynamically by detecting the relative positional relationship between microphones and automatically selecting which microphones to activate based on the wearing state (left or right ear). This dynamic switching allows the system to maintain optimal noise reduction performance without requiring all microphones to operate simultaneously, thereby managing complexity.
2Measurement precision
If microphones are positioned to collect sound from different directions for better noise reduction, then sound pickup effectiveness is improved, but the structure becomes more complex
Solution Approach 1:
Different microphones are positioned at specific locations with distinct sound collection characteristics. The first microphones are positioned on the abutting portion to collect ambient sound from outside the ear canal, while the second microphone is positioned on the sound-producing portion to collect sound from the ear canal. This local quality differentiation enables effective noise reduction by comparing sounds from different acoustic environments.
Solution Approach 2:
The microphone positions are arranged asymmetrically relative to the ear structure, with sound entry holes positioned at different distances from the symmetry plane. This asymmetric arrangement ensures that microphones capture sound waves from different paths and directions, improving the ability to distinguish between target speech and background noise.
3Adaptability or versatility
If the earphone is designed to support left-right ear interchange, then adaptability is improved, but the microphone control system becomes more complex
Solution Approach 1:
The microphone control system dynamically adapts to the wearing orientation by detecting the relative positional relationship between microphones. When the earphone is worn on the left or right ear, the detection element identifies the configuration and the processing circuit automatically selects the appropriate microphone combination for optimal noise reduction. This dynamic adaptation enables left-right interchange without requiring manual configuration or complex mechanical switching mechanisms.
Solution Approach 2:
The detection element continuously monitors the relative positional relationship between microphones and provides feedback to the processing circuit. Based on this feedback, the processing circuit adjusts which microphones are activated and how they are configured for noise reduction processing. This feedback mechanism enables automatic adaptation to different wearing orientations, achieving left-right ear interchange capability through intelligent control rather than mechanical complexity.
Data Source
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AI summary
Provided is an earphone. The earphone includes a sound-producing portion, an abutting portion, and an ear hook. The abutting portion includes two first microphones, the two first microphones are configured to collect a first sound respectively. The sound-producing portion includes a second microphone, and the second microphone is configured to collect a second sound. The earphone further includes a detection element and a processing circuit. The detection element is configured to detect a relative positional relationship between the two first microphones in a wearing state. The processing circuit controls one first microphone of the two first microphones that is relatively higher in a gravity direction to be in an operating state and controls the other one first microphone of the two first microphones that is relatively lower in the gravity direction to be in a non-operating state according to a detection result of the detection element, and further performs noise reduction processing based on the first sound collected by the first microphone in the operating state and the second sound collected by the second microphone.