Headset Microphone Boom Segmentation for Noise Suppression
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Solution Overview
Problem
Existing headsets with single microphones at the tip of the microphone boom suffer from deteriorated sound collecting performance in noisy environments, and attempts to enhance this by lengthening the boom lead to increased weight, causing discomfort and usability issues during long-term use.
Innovation Solution
A headset design featuring a housing with a boom main body, an arm portion, a first microphone at the protruding tip, and a second microphone on the arm portion disposed on a straight line passing through the mouth, allowing for improved sound collection and reduced weight by controlling directivity and suppressing ambient noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the microphone boom is made longer to place the microphone at the mouth, then the sound collecting performance is improved, but the weight increases and it becomes difficult to reduce the weight
Solution Approach 1:
The patent divides the single microphone function into multiple microphones (first microphone at the tip and second microphone on the arm portion). This segmentation allows the system to achieve improved sound collection performance through multiple proximity microphones without requiring an excessively long boom, thus avoiding excessive weight increase.
2Measurement precision
If the microphone boom is made longer to enhance sound collecting performance, then the sound can be collected better, but the headset size becomes large and weight reduction becomes difficult
Solution Approach 1:
The patent uses multiple microphones positioned at different locations (tip and arm portion) rather than extending the boom length. This segmentation approach achieves the goal of capturing sound near the mouth while keeping the overall boom structure compact and manageable in length.
Solution Approach 2:
Instead of solving the sound collection problem by extending in one dimension (boom length), the patent distributes microphones across different spatial positions on the existing boom structure, utilizing multiple dimensions of the available space to achieve effective sound capture.
3Device complexity
If a single microphone is used at the tip of the boom, then the structure is simple, but the sound collecting performance deteriorates in noisy environments
Solution Approach 1:
The patent segments the sound collection function across multiple microphones (first and second microphones) positioned at different locations on the boom. This segmentation improves sound collection performance in noisy environments by providing multiple signal sources for processing, while the microphones remain integrated into the existing boom structure to maintain reasonable complexity.
Solution Approach 2:
The patent combines multiple microphones into the existing boom structure, merging their functions to achieve improved sound collection performance. The microphones work together as an integrated system within the boom, providing enhanced noise rejection and sound quality without requiring a completely new complex structure.
Data Source
AI summary
A headset includes a housing provided at one end of a headband, an ear pad attached to the housing, a boom main body attached to the housing on a side opposite to the ear pad, an arm portion provided in the boom main body and protruding to a side opposite to one end of the headband with the housing interposed between the headband and the arm portion, a first microphone provided at a protruding tip of the arm portion, and a second microphone provided on the arm portion, and disposed on a substantially straight line passing through a mouth of a user and the first microphone and on a side opposite to the mouth of the user with the first microphone interposed between the mouth and the second microphone.