Time-Weighted Acoustic Exposure Control for Multi-Device Audio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing audio output devices fail to dynamically adjust peak levels based on the sum of workplace environment noise and ongoing communication needs, leading to potential overexposure and compromised sound quality due to static limits that compress acoustic energy.
Innovation Solution
A communication device with a processor that monitors and adjusts audio output levels from multiple sources, including headsets, earbuds, and ambient noise, to ensure compliance with safety standards and maintain sound quality by reducing output when exposure thresholds are exceeded.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static audio output limits are applied to ensure safety compliance, then user safety is improved, but sound quality deteriorates due to compression of acoustic energy
Solution Approach 1:
The patent implements dynamic audio output limiting that adjusts compression in real-time based on the user's cumulative acoustic exposure. Instead of applying static compression throughout the day, the system monitors exposure levels and dynamically adjusts the degree of limiting applied to audio output, ensuring safety compliance while preserving sound quality when exposure is below thresholds.
Solution Approach 2:
The system changes the parameter of audio output compression based on cumulative exposure time and intensity. As the user's acoustic exposure approaches safety thresholds, the system progressively increases compression; when exposure is low, compression is minimized or eliminated, thereby maintaining sound quality while ensuring safety limits are not exceeded.
2Reliability
If audio output is limited to ensure safety compliance, then user safety is improved, but communication performance deteriorates
Solution Approach 1:
The system dynamically adjusts audio output limits based on real-time monitoring of cumulative exposure and current communication context. During brief high-intensity communications, the system allows higher output levels that would otherwise be limited, thereby maintaining communication performance while still ensuring long-term safety compliance through time-weighted averaging.
Solution Approach 2:
The system performs preliminary monitoring of cumulative acoustic exposure before applying limits to communication audio output. By tracking exposure in advance and understanding the user's acoustic history, the system can make informed decisions about appropriate limiting that preserve communication effectiveness while ensuring safety compliance.
3Measurement precision
If monitoring of multiple audio sources is implemented to accurately assess cumulative exposure, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the monitoring functions for multiple audio sources (headphones, earbuds, ambient noise) into a unified cumulative exposure assessment system. Instead of treating each source separately with independent monitoring chains, the system combines inputs from multiple sources and calculates cumulative exposure as a single integrated metric, thereby improving measurement precision while managing system complexity through consolidation.
Solution Approach 2:
The system implements a universal monitoring framework that handles multiple types of audio sources through a common architecture. The same processing logic and exposure calculation algorithms are applied regardless of whether the audio comes from headphones, earbuds, or ambient environment, enabling accurate cumulative assessment without requiring separate complex systems for each source type.
Data Source
AI summary
Workplace safety is a principal concern in many environments. Protecting user ears from damage due to extended exposure to unacceptably high sound volume serves as an important component to workplace safety. Monitoring a device, such as a phone, utilized by a user often provides an incomplete picture of the sound level presented to the user. As provided herein, monitoring a user's sound exposure on one device may cause the sound level presented to the user from a second device to become limited. Additionally, over time the sound level limits may be adjusted based on the cumulative historic sound exposure. As a result, the user may avoid exposure to unacceptably high sound levels originating from more than one source and/or over an extended period of time.