Earpiece Audio Level Control with Dynamic Exposure Monitoring
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Solution Overview
Problem
Existing sound monitoring systems fail to effectively protect against hearing damage by not accounting for cumulative noise exposure over time and lack personalized monitoring and remedial actions, with prior art devices either inadequately reducing noise levels or not considering listening duration and restorative effects.
Innovation Solution
A system comprising an audio transducer that measures and stores sound pressure levels, a logic circuit that calculates time-weighted average sound pressure doses, and an indicator element that notifies users of safe listening durations and potential hearing damage, incorporating a database for user-specific audiogram compensation and frequency response functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If static earplugs are used to shield the inner ear from high decibel noise, then the ear is protected from ambient noise, but they do not completely prevent high decibel noise from reaching the ear and do not account for the duration of exposure
Solution Approach 1:
The patent transitions from static earplugs to a dynamic active noise control system that continuously monitors sound pressure levels and adjusts attenuation in real-time based on measured exposure, making the protection adaptive rather than fixed
Solution Approach 2:
The system incorporates feedback by measuring sound pressure levels with a microphone, processing the signals to determine exposure duration and intensity, and using this information to control the attenuation applied to the audio signal, creating a closed-loop protective system
2Object-affected harmful factors
If active noise reduction is used to attenuate noise reaching the inner ear, then noise protection is improved, but there is no monitoring of noise over time to account for the cumulative effect
Solution Approach 1:
The system continuously monitors sound pressure levels and integrates this information over time to track cumulative exposure, using feedback loops to adjust attenuation based on the measured history of noise exposure rather than treating each moment independently
Solution Approach 2:
The system performs preliminary monitoring and calculation of exposure metrics before making attenuation decisions, maintaining a running record of exposure duration and intensity to inform subsequent protection actions
3Object-affected harmful factors
If headphones are limited to predetermined maximum output levels, then some protection is provided, but it does not take into account listening duration and the calculation of risk for auditory injury
Solution Approach 1:
The system replaces fixed maximum output levels with dynamic attenuation that changes over time based on cumulative exposure metrics, allowing the protection level to adapt as the user listens rather than maintaining a constant limit
Solution Approach 2:
The system changes the attenuation parameter dynamically based on measured sound pressure levels and exposure duration, adjusting the protection level according to the calculated risk of auditory injury rather than applying a fixed parameter
4Measurement precision
If dosimeters are used to measure sound levels within the ear canal, then noise measurement is provided, but no remedial action is taken as a result of the readings
Solution Approach 1:
The patent combines the measurement function with the protection function by integrating the dosimeter capability with active noise control, so that the same system that measures sound levels also automatically applies remedial attenuation based on those measurements
Solution Approach 2:
The system uses feedback from the measured sound levels to automatically trigger remedial actions through dynamic attenuation control, eliminating the gap between measurement and response that exists in passive dosimeter systems
Data Source
AI summary
A monitoring system can include an earpiece, a database with stored earpiece characteristics data, and a microphone to receive a plurality of signals where each signal of the plurality of signals can represents a respective sound pressure level of sound pressure values over a time duration. The system can also include a processor and a memory coupled processor, the memory having computer instructions winch when executed by the processor causes the processor to perform the operations. The operations can include determining exposure time duration when a signal of the plurality of signals exceeds a sound pressure level threshold value, retrieving a subset of data of the stored earpiece characteristics data, and modifying an acoustic output of the earpiece in accordance with the subset of data of the stored earpiece characteristics data.