Bluetooth Hearing Aid Intercom for Clear Speech at Distance
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Solution Overview
Problem
Conventional hearing aids face challenges in maintaining effective communication, especially for individuals with hearing impairments, particularly in domestic environments with background noise and reverberation, and during group activities like biking, where distance and environmental factors hinder clear speech intelligibility.
Innovation Solution
A Bluetooth-enabled intercom system integrated with hearing aids, allowing for short-range communication among users, even when they are not in close proximity, utilizing Bluetooth technology to establish a network for seamless voice interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hearing aids are used, then hearing assistance is provided, but communication effectiveness deteriorates in noisy environments and at distances greater than 1.8 meters
Solution Approach 1:
The patent introduces a remote microphone unit as an intermediary device that captures speech signals at the source and transmits them wirelessly to the hearing aid. This mediator bypasses the problematic acoustic path through noisy environments, delivering clear speech directly to the hearing aid's processor.
Solution Approach 2:
The patent replaces the acoustic transmission mechanism (sound waves traveling through air) with an electronic transmission mechanism (wireless digital signal transmission). This substitution eliminates the degradation of speech signals caused by background noise and reverberation in the acoustic path.
2Reliability
If conventional hearing aids are used, then hearing assistance is provided, but speech intelligibility deteriorates at distances greater than 1.8 meters
Solution Approach 1:
The remote microphone unit serves as a mediator that captures speech at a distance and delivers it electronically to the hearing aid, bypassing the limitation of acoustic signal degradation over distance.
Solution Approach 2:
The patent substitutes acoustic wave transmission with electronic signal transmission, enabling speech to be transmitted clearly over distances much greater than 1.8 meters without the attenuation and distortion that occurs with acoustic propagation.
3Length of stationary object
If hearing aids with Bluetooth connectivity are used, then communication range is extended, but device complexity increases
Solution Approach 1:
The system is divided into separate functional components: a remote microphone unit with its own processor and wireless transmitter, and a hearing aid with integrated processing. This segmentation allows the Bluetooth connectivity functionality to be isolated in the remote unit, keeping the hearing aid itself relatively simple.
Solution Approach 2:
The remote microphone unit is designed to work with multiple hearing aids and potentially multiple users, providing a universal solution that extends communication range without requiring each hearing aid to have complex built-in capabilities.
Data Source
AI summary
A hearing aid, comprising a microphone configured to produce a microphone output signal representing sounds transduced by the microphone; an earphone speaker configured to convert an equalized output electrical signal into acoustic waves; a Bluetooth wireless transceiver; and an automated processor configured to spot a plurality of different keywords; and selectively control a Bluetooth communication partner dependent on the spotted keyword.