Dichotic Sound Compression Coordination for In-Ear Hearing Protection
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Solution Overview
Problem
In-ear hearing protection devices operating independently can cause inconsistent sound volumes and disrupt the natural localization process, leading to discomfort and vertigo, due to differing compression and processing of ambient sounds.
Innovation Solution
A system for coordinating sound compression between a pair of in-ear protection devices using a wireless datalink, such as near-field magnetic induction (NFMI), allowing for periodic exchange of attenuation information to ensure synchronized compression and equalization, reducing power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-ear hearing protection devices operate independently with individual sound compression, then each device can process ambient sound to safe levels, but inconsistent sound volumes and disrupted localization occur causing discomfort and vertigo
Solution Approach 1:
The patent merges the independent operation of left and right hearing protection devices by introducing wireless communication between them. Each device shares its attenuation characteristics and sound pressure level data with the other, allowing coordinated compression that maintains consistent interaural level differences and preserves natural sound localization while still providing individual hearing protection.
2Ease of operation
If wireless communication is implemented between hearing protection devices for coordinated compression, then sound localization consistency is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic exchange of attenuation information and coordination data between the hearing protection devices rather than continuous communication. This periodic action maintains synchronized compression and consistent sound localization while significantly reducing power consumption compared to continuous wireless communication.
3Ease of operation
If frequent data exchange is performed between devices for synchronized compression, then sound localization consistency is improved, but latency increases
Solution Approach 1:
The patent performs preliminary calculations of attenuation characteristics and compression parameters locally at each device before exchanging data with the other earpiece. This preliminary action reduces the amount of data that needs to be communicated and allows faster synchronization, thereby reducing latency while maintaining consistent sound localization.
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 coordinated system provides a more natural sound experience by maintaining consistent sound localization and reducing discomfort, while efficiently managing power consumption.
Implementation Method 1
A system for coordinating sound compression between a pair of in-ear protection devices using a wireless datalink, such as near-field magnetic induction (NFMI)
Data Source
AI summary
An in-ear hearing protection device is provided. The in-ear hearing protection device includes a microphone (410) configured to receive an ambient sound. The in-ear hearing protection device also includes a processor (420) configured to perform an attenuation function on the received ambient sound to provide an attenuated sound. The in-ear hearing protection device also includes a speaker (440) configured to broadcast the attenuated sound. The in-ear hearing protection device also includes a communication module (430) configured to receive a second attenuation function detail from a second in-ear protection device. The processor is configured to calculate a first attenuation function detail and compare the first and second attenuation function details. The performed attenuation function is based on one of the first and second attenuation function details.