Frequency-Specific Audio Dose Control for Cumulative Hearing Exposure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Portable media players expose users to high sound pressure levels, increasing the risk of hearing impairments due to prolonged exposure to loud music, and existing solutions do not effectively manage sound pressure levels across different frequency ranges to prevent cumulative hearing damage.
Innovation Solution
A method for controlling the audio dose consumed by users, which involves determining the audio dose within specific frequency ranges, evaluating the audio dose of media tracks, and adjusting playback volume to keep the cumulative sound pressure level below predefined limits, using a media player's equalizer settings and physiological memory models to ensure safe listening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the audio volume is increased to provide better music listening experience, then the user enjoyment is improved, but the hearing damage risk increases
Solution Approach 1:
The system pre-calculates and stores audio dose values for media tracks before playback. This preliminary action allows the system to predict cumulative exposure and prevent hearing damage before it occurs, rather than merely monitoring after exposure has already happened.
Solution Approach 2:
The system continuously monitors the user's cumulative audio dose exposure and provides feedback by selecting or rejecting media tracks based on whether playback would exceed safe exposure limits. This closed-loop feedback mechanism dynamically adjusts playback decisions to maintain safety while preserving user experience.
2Reliability
If the audio dose is limited to prevent hearing damage, then the hearing safety is improved, but the music listening quality may deteriorate
Solution Approach 1:
The system applies different audio dose limits to different frequency ranges (e.g., bass frequencies vs. treble frequencies) based on their respective harmful effects. This localized approach allows the system to maintain high-quality playback in safe frequency ranges while strictly limiting exposure in dangerous frequency ranges, thereby preserving overall music listening quality while ensuring hearing safety.
Solution Approach 2:
The system dynamically adjusts playback parameters such as volume level and frequency distribution based on the user's cumulative exposure history. By changing these parameters adaptively, the system maintains acceptable music listening quality while staying within safe exposure limits, rather than simply reducing overall volume or blocking playback entirely.
3Reliability
If the system monitors audio dose in real-time to prevent hearing damage, then the hearing protection is improved, but the device complexity increases
Solution Approach 1:
The system pre-calculates audio dose values for all media tracks in the library and stores them in a database before actual playback occurs. This preliminary computation shifts the computational burden from real-time monitoring to offline preprocessing, significantly reducing the complexity of real-time system operations while maintaining comprehensive hearing protection capabilities.
Solution Approach 2:
The system creates and uses digital representations (copies) of audio dose information stored in a database, rather than continuously analyzing actual audio signals during playback. This copying approach simplifies the monitoring system by working with pre-computed data structures instead of requiring complex real-time audio analysis, thereby reducing device complexity while maintaining effective hearing protection.
4Measurement precision
If the audio dose determination includes frequency-specific analysis, then the measurement precision is improved, but the computational complexity increases
Solution Approach 1:
The system divides the audio frequency spectrum into multiple discrete frequency ranges (e.g., bass, mid-range, treble) and calculates audio dose separately for each segment. This segmentation enables precise frequency-specific measurement while simplifying computation by breaking down the complex full-spectrum analysis into multiple simpler, independent calculations that can be pre-computed and stored.
Data Source
Figure 1a
Figure 1b~2
Figure 3~4
AI summary
The present document relates to media players, such as portable electronic devices, vehicle audio systems, home stereo systems, etc. In particular, it relates to the management of the sound pressure level generated by portable electronic devices. A method and system for controlling the consumed audio dose of a user of a media player is described. The method comprises the steps of selecting a first frequency range from the total frequency range relevant for the human ear; of determining the audio dose already consumed by the user within the first frequency range; of evaluating the audio dose of a media track within the first frequency range and the already consumed audio dose of the user within the first frequency range; and of controlling the audio dose generated by the media player based on the evaluating step.