Integrated Hearing Protector Audio Path for Low-Distortion Communication
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Solution Overview
Problem
In noisy environments, using both active ear cups and ear plugs simultaneously leads to increased sound signal conversions, resulting in distortion and reduced sound quality, making communication difficult due to the passive nature of traditional hearing protectors.
Innovation Solution
A system comprising an outer and inner hearing protection unit with a shared microphone and speaker connection, allowing only one conversion of the acoustic signal to electric and back, reducing distortion and enhancing sound quality while providing double noise attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If both active ear cups and active ear plugs are used simultaneously, then noise attenuation is improved, but sound signal distortion increases due to multiple conversions
Solution Approach 1:
The patent merges the active hearing protection functions into a single integrated device that combines both ear cup and ear plug components. This unified active protector performs only one acoustic-to-electric signal conversion, eliminating the multiple conversions that occur when separate active ear cups and ear plugs are used together, thereby reducing sound signal distortion while maintaining effective noise attenuation.
2Object-affected harmful factors
If passive ear plugs are added to active ear cups, then noise attenuation is improved, but communication capability deteriorates due to excessive sound attenuation
Solution Approach 1:
The patent implements dynamic control where the active hearing protector can adaptively adjust sound levels based on environmental conditions. The electronic circuitry monitors ambient sounds and actively compensates for attenuation, dynamically adjusting the reproduced sound levels to maintain communication capability while providing noise protection. This allows the system to overcome the static attenuation of passive components.
Solution Approach 2:
The system incorporates feedback mechanisms where microphones detect ambient sounds and the electronic circuitry processes these signals to provide active compensation. The feedback loop ensures that desired sounds are reproduced at appropriate levels, counteracting the excessive attenuation caused by combined passive components and maintaining communication effectiveness.
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 enables clear communication by minimizing sound signal conversions, maintaining sound quality, and offering flexible, user-oriented use of active hearing protection units, reducing the need for manual adjustments in noisy settings.
Implementation Method 1
a microphone arranged to be electrically connectable for transmission of signals to the speaker
Implementation Method 2
the inner hearing protection unit comprising a speaker
Implementation Method 3
Traditional hearing protectors comprise a sound-attenuating material, a sound absorber, which separates the inner parts of the ear from the surroundings
Data Source
AI summary
A system for hearing protection comprising an outer hearing protection unit, an inner hearing protection unit, and an outer microphone is disclosed, the inner hearing protection unit comprising a speaker and the microphone being arranged to be electrically connectable for transmission of signals to the speaker.