Mobile Device Dual Microphone Noise Reduction Power Conservation
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Solution Overview
Problem
Mobile electronic devices face a challenge in balancing battery life and form factor, as power management techniques to extend battery life are not sufficient for devices requiring noise reduction in varying ambient noise environments, leading to increased power consumption and reduced talk-time in multi-microphone systems.
Innovation Solution
A mobile device that dynamically switches between single and dual microphone noise reduction modes based on ambient noise levels, powering down the second microphone and associated hardware in low noise conditions to conserve power and extend battery life, while maintaining operational effectiveness in high noise environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dual microphone noise reduction processing is used, then noise reduction capability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the microphone system adjustable between different operational states. The system dynamically switches between single microphone mode and dual microphone mode based on ambient noise conditions. The power management module monitors noise levels and activates the second microphone only when necessary, transforming a static system into a dynamic one that adapts to environmental conditions.
Solution Approach 2:
The patent changes the operational parameter of the microphone system from fixed dual-microphone operation to variable operation. The power management module alters the system state by deactivating the second microphone and its associated processing when ambient noise is below a threshold, thereby changing the operational parameters to reduce power consumption while maintaining adequate noise reduction capability.
2Object-affected harmful factors
If dual microphone system is activated, then noise reduction performance is improved, but battery life is reduced
Solution Approach 1:
The system dynamically adjusts its operational mode based on environmental noise conditions. By monitoring ambient noise levels and switching between single and dual microphone modes, the system extends battery life by avoiding continuous operation of the power-intensive dual microphone system, while still providing superior noise reduction when needed.
Solution Approach 2:
The power management module changes the operational parameter of the microphone system based on noise threshold detection. When ambient noise exceeds the threshold, the system transitions to dual microphone mode for enhanced performance; otherwise, it operates in single microphone mode to conserve battery life, thereby extending the duration of action.
3Use of energy by moving object
If second microphone is deactivated, then power consumption is reduced, but noise reduction capability deteriorates in high noise environments
Solution Approach 1:
The patent implements feedback by having the power management module continuously monitor ambient noise levels and use this information to control the operation of the second microphone. The system receives feedback about environmental conditions and adjusts its configuration accordingly, activating the second microphone when noise exceeds a threshold and deactivating it when noise is low, thus optimizing both power consumption and noise reduction capability.
Data Source
AI summary
Methods and systems for power conservation in mobile devices are presented. In one example, a mobile communication device includes a first microphone and a second microphone. The mobile communication monitors an ambient noise level and responsive to the ambient noise level operates the mobile communication device in a normal operation mode or a power conservation mode. In power conservation mode, use of the second microphone is discretionary.