ANR Headset Compressor Threshold Control for Battery Voltage Drops

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Solution Overview

Problem

Active noise reduction (ANR) systems in headsets consume a significant proportion of power, and conventional systems are not adaptable to distinct power source characteristics, leading to diminished performance and inefficient power usage.

Innovation Solution

A headset with a control circuit that applies ANR to environmental sound, samples voltage drops across the power source, and adjusts the compressor threshold based on these drops to optimize power usage and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If active noise reduction (ANR) is applied to environmental sound, then noise reduction performance is improved, but power consumption increases significantly

Engineering Contradiction:

Improvenoise reduction performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic adjustment of the compressor threshold based on real-time voltage drop sampling. The control circuit continuously monitors power source characteristics and adapts the ANR compressor threshold accordingly, transitioning from static to dynamic operation to optimize the balance between noise reduction performance and power consumption

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters of the ANR system by adjusting the compressor threshold based on power source voltage characteristics. When voltage drops are detected (indicating low battery state), the compressor threshold is modified to reduce power consumption while maintaining acceptable noise reduction performance

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If a fixed compressor threshold is used for ANR, then system simplicity is maintained, but performance diminishes under varying power source conditions

Engineering Contradiction:

Improvesystem simplicityVSAvoidANR performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent introduces a feedback mechanism where the control circuit samples voltage drops across the power source and uses this information to adjust the compressor threshold. This closed-loop feedback system ensures optimal ANR performance adapts to varying power source conditions without requiring complex user intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The ANR system performs self-adjustment by automatically monitoring its own power source characteristics and modifying its compressor threshold accordingly. The system serves itself by detecting power availability and autonomously optimizing its operation, eliminating the need for manual user configuration

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260094598A1Power-Adaptive Active Noise Reduction (ANR) Headset

Publication Date: 2026.04.02 BOSE CORP

AI summary

Various aspects include active noise reduction (ANR) headsets and methods of controlling such headsets. In some implementations, a headset includes: at least one electro-acoustic transducer; a power source for powering the at least one electro-acoustic transducer, and a control circuit configured to apply active noise reduction (ANR) to environmental sound using the at least one electro-acoustic transducer, sample voltage drops across the power source, and adjust a compressor threshold for the ANR based on the sampled voltage drops across the power source.