Headphone Volume Smoothing for Ambient Noise and Hearing Protection
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Solution Overview
Problem
Users often increase sound volume based on ambient noise, leading to continuous loud listening, which is undesirable for hearing protection, and existing volume control methods cause users to notice volume changes, resulting in discomfort.
Innovation Solution
A headphone volume control method that calculates the sound signal level, sets a target volume based on ambient noise, and gradually adjusts the content volume over time, using a processor to minimize noticeable changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sound volume is increased based on ambient noise level, then user can hear content clearly in noisy environments, but user continues to hear content at large volume even when surroundings become quiet, causing hearing damage
Solution Approach 1:
The patent implements dynamic volume adjustment where the reproduction volume automatically adapts to changing ambient noise levels. The processor continuously monitors ambient noise and adjusts the volume in real-time, transitioning from static manual control to dynamic adaptive control, thereby preventing continuous loud listening when surroundings become quiet.
Solution Approach 2:
The system uses feedback from the ambient noise detection mechanism to automatically adjust reproduction volume. The processor receives feedback about environmental sound levels and modifies the output volume accordingly, creating a closed-loop control system that prevents hearing damage by reducing volume when ambient noise decreases.
2Object-affected harmful factors
If sound volume is automatically changed depending on ambient noise level, then hearing protection is improved, but user notices the volume change and feels sense of incongruity
Solution Approach 1:
The patent applies preliminary action by gradually changing the reproduction volume over a predetermined period rather than making immediate adjustments. This gradual transition prepares the user's auditory system for volume changes, preventing noticeable discontinuities and maintaining user comfort while still providing hearing protection.
Solution Approach 2:
The system implements dynamic volume control with gradual transitions, adjusting the reproduction volume smoothly over time rather than making abrupt changes. This dynamic approach with controlled rate of change ensures hearing protection while maintaining user comfort by avoiding noticeable volume shifts.
3Ease of operation
If volume is adjusted manually by user, then user maintains control over sound level, but user continues to hear at large volume even when unnecessary, leading to hearing protection issues
Solution Approach 1:
The patent implements self-service by enabling the headphone system to automatically monitor ambient noise and adjust reproduction volume without requiring continuous manual user intervention. The system serves itself by detecting environmental conditions and making appropriate volume adjustments, thereby preventing hearing damage while reducing operational burden on the user.
Data Source
AI summary
A headphone volume control method calculates a level of a sound signal, which is captured by a microphone, during a first period, determines a target value of a sound volume based on the above-mentioned level, and gradually changes a reproduction volume of content to be reproduced to the above-mentioned target value over a second period.