Active Noise Reduction Headset Profiles for Battery Life

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Solution Overview

Problem

Existing active noise reduction headsets for vehicles are optimized for low-frequency noise inside the vehicle and consume excessive power when used outside the vehicle, where noise levels are lower, leading to rapid battery depletion.

Innovation Solution

An active noise reduction system that automatically adjusts noise reduction profiles and power consumption based on connection to an external power supply, using a battery-powered mode with reduced noise cancellation when disconnected, optimizing power usage and extending battery life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the headset uses full active noise reduction when disconnected from external power, then noise cancellation performance is maintained, but battery power is depleted rapidly

Engineering Contradiction:

Improvenoise cancellation performanceVSAvoidbattery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the active noise reduction profile based on power availability. When disconnected from external power, the system switches to a battery-saving mode that modifies the noise reduction algorithm to consume less power while maintaining adequate performance for lower ambient noise levels typically encountered outside vehicles.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes operational parameters of the active noise reduction system based on power source availability. Specifically, it modifies the noise reduction profile parameters (such as filtering thresholds, processing intensity, and frequency ranges) to optimize the balance between performance and power consumption when running on battery power versus external power.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the headset is optimized for low-frequency noise cancellation inside vehicles, then noise reduction effectiveness is improved, but power consumption increases when used outside vehicles with lower noise levels

Engineering Contradiction:

Improvenoise reduction effectivenessVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically switches between different noise reduction profiles based on the operational context. When outside a vehicle, it activates a battery-powered profile that reduces processing intensity and adjusts frequency response to match lower ambient noise levels, thereby conserving power while maintaining adequate noise reduction effectiveness.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies different noise reduction characteristics to different frequency ranges and operational modes. The battery-powered profile applies localized adjustments to specific frequency bands and processing parameters that are most relevant for outdoor environments, rather than uniformly reducing all noise reduction capabilities.

Inventive Principle:

Principle #3Local quality

3Reliability

If the system maintains high active noise reduction settings continuously, then noise cancellation performance is optimized, but battery life is significantly reduced

Engineering Contradiction:

Improveactive noise reduction performanceVSAvoidbattery life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The system implements periodic monitoring of power source availability and dynamically adjusts noise reduction intensity accordingly. By alternating between high-performance mode (when externally powered) and battery-saving mode (when disconnected), the system optimizes the balance between maintaining noise cancellation performance and preserving battery life for extended periods.

Inventive Principle:

Principle #19Periodic action

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

The system effectively extends battery life by up to 25% by reducing power consumption while maintaining adequate noise reduction outside the vehicle, adapting to different noise levels with customized profiles.

Implementation Method 1

at least one noise detection microphone arranged to detect noise external to the headset

Methodology Applied

Scientific EffectAcoustic detection: Sound

Implementation Method 2

at least one speaker for creating sound in the headset

Methodology Applied

Scientific EffectElectroacoustic conversion: Sound

Data Source

PatentUS12451113B2Device and method for active noise control

Publication Date: 2025.10.21 INVISIO COMMUNICATIONS LTD

AI summary

The invention provides an active noise reduction system which may be self-contained within a headset of the system, wherein circuitry within the system applies an active noise reduction profile to a signal to the speakers in the headset, to provide active noise reduction to the user of the headset, the system being arranged to receive power both from a power supply external to the system and from a battery of the system and to automatically modify the active noise reduction applied, in dependence on whether or not the system is connected to an external power supply.