Programmable Headset Microphone Modes for Beam Pattern Switching
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Solution Overview
Problem
Conventional audio headsets lack effective noise management in varying ambient environments, leading to suboptimal sound quality and interference from background noise.
Innovation Solution
A headset with programmable microphone modes that uses a beamforming microphone to configure its beam pattern based on ambient noise levels, switching between wide and narrow patterns depending on the environment, allowing for improved sound reception and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional omnidirectional microphone is used, then the headset can capture sound from all directions, but it cannot effectively filter out background noise in noisy environments
Solution Approach 1:
The patent implements dynamic beamforming that adjusts the microphone array's sensitivity pattern in real-time based on ambient noise conditions. The system switches between omnidirectional mode (for quiet environments) and directional beam patterns (for noisy environments), allowing the microphone to adapt its acoustic characteristics dynamically rather than being fixed in a single configuration
Solution Approach 2:
The system changes the operational parameters of the microphone array by adjusting beamforming weights and patterns based on detected ambient noise levels. When noise exceeds a threshold, the system transitions from wide-pattern reception to narrow beam patterns, effectively changing the spatial frequency response parameters to prioritize voice frequencies and directions while attenuating background noise
2Object-affected harmful factors
If the microphone uses a narrow beam pattern to focus on the desired sound source, then background noise is reduced, but the field of view for sound capture is limited
Solution Approach 1:
The system dynamically switches between wide and narrow beam patterns based on ambient noise conditions. In quiet environments, it uses wide or omnidirectional patterns to capture sound from all directions. In noisy environments, it transitions to narrow beam patterns that focus on the desired sound source, thus adapting the field of view to match the acoustic requirements of the environment
Solution Approach 2:
The microphone array is designed to perform multiple functions: it can operate in omnidirectional mode for general sound capture, switch to directional beam patterns for noise rejection, and adjust between different beam widths as needed. This multi-functional capability allows a single device to handle both wide-area sound capture and focused noise-filtered reception
3Ease of operation
If the headset automatically configures modes based on ambient noise, then user convenience is improved, but the system complexity increases
Solution Approach 1:
The headset incorporates automatic noise-level detection and self-configuring capabilities that allow it to autonomously determine the appropriate microphone mode based on ambient acoustic conditions. The system monitors ambient noise levels and automatically switches between omnidirectional and directional beam patterns without requiring manual user input, making the device self-adjusting to its acoustic environment
Solution Approach 2:
The system uses feedback from ambient noise level sensing to automatically adjust microphone configuration. The noise detection circuit continuously monitors the acoustic environment, and based on this feedback, the beamforming controller adjusts the microphone array patterns in real-time, creating a closed-loop system that responds to changing acoustic conditions
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
Enhances sound quality by optimizing microphone sensitivity according to ambient conditions, effectively filtering out background noise and improving voice clarity in noisy environments.
Implementation Method 1
configure a beam pattern of the beamforming microphone based on at least the sensed ambient noise level
Data Source
AI summary
A method and system for a headset with programmable modes, where the headset comprises a speaker and a beamforming microphone: sensing an ambient sound level near the headset, and configuring the headset in one of a plurality of modes by configuring a beam pattern of the beamforming microphone based on at least the sensed ambient noise level. A user of the headset may configure the headset in the one of the plurality of modes or it may be automatically configured. The beamforming microphone may comprise an array of sound sensing elements. The headset may be configured in a quiet mode when the sensed ambient sound level is below that of a desired sound source and may be configured with a wide beam pattern. The headset may be configured in a loud mode when the sensed ambient sound level is above that of a desired sound source.