Hearing Aid Remote Object Detection for Sound Source Separation
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Solution Overview
Problem
Individuals with hearing loss face challenges in crowded environments due to cumbersome sound processing and difficulty in detecting and separating active sound sources, which increases their risk of accidents in traffic situations.
Innovation Solution
A hearing aid apparatus equipped with a directional microphone system and a remote object detection unit that uses electromagnetic signals to detect and classify remote objects, providing adaptable directionality and warning signals based on object speed and type, enhancing sound source enhancement and danger warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a directional microphone system is used to detect and separate active sound sources, then sound processing capability is improved, but device complexity increases
Solution Approach 1:
The system divides sound processing into multiple directional beams, each handling a specific spatial sector. The microphone array is segmented into multiple processing channels, with each channel independently processing sounds from a particular direction, thereby simplifying the overall detection task while maintaining comprehensive coverage
Solution Approach 2:
Beamforming algorithms serve as an intermediary layer between the physical microphone array and the sound source detection logic. This intermediary processes the raw microphone signals to create directional sensitivity patterns, making it easier to detect and separate sound sources without requiring complex hardware modifications
2Reliability
If remote object detection using electromagnetic signals is added, then safety warning capability is improved, but device complexity increases
Solution Approach 1:
The system integrates multiple detection functions (acoustic sound source detection, electromagnetic remote object detection, and beamforming) into a single hearing aid platform. The processor unit handles multiple detection tasks and integrates their outputs to provide comprehensive safety warnings, thereby achieving multi-functionality without proportionally increasing overall system complexity
Solution Approach 2:
The patent combines acoustic microphone array processing with electromagnetic sensor detection in a unified system architecture. Both detection modalities are merged into a single processing pipeline that coordinates their outputs to provide integrated safety warnings, reducing the complexity that would arise from completely separate systems
3Measurement precision
If beamforming is applied to enhance sound from desired sources, then sound quality is improved, but processing time increases
Solution Approach 1:
The beamforming computation is performed periodically rather than continuously, updating directional filters at optimized intervals. This periodic processing maintains accurate sound source separation while reducing computational burden and processing time compared to continuous real-time beamforming
Solution Approach 2:
The beamforming parameters are dynamically adjusted based on detected sound source characteristics and environmental conditions. The system adapts beamwidth, direction, and weighting factors in real-time to match current acoustic scenarios, improving sound separation efficiency while minimizing unnecessary processing
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 apparatus effectively enhances sound from desired sources and provides timely warnings of approaching dangers, improving safety for individuals with hearing loss in busy environments by accurately tracking and classifying remote objects and adapting the directional microphone system for improved sound processing.
Implementation Method 1
a remote object detection unit configured to transmit, and receive, an electromagnetic signal having a carrier frequency within the 1 to 100 GHz frequency range
Implementation Method 2
acoustical signals from the acoustical surrounding which impinge upon a reception unit
Data Source
Figure 1~6
AI summary
The present disclosure relates to an apparatus having a directional microphone system having adaptable directionality and a remote object detection unit configured to detect a remote object by detecting a transmitted signal reflected from the object, the directionality of the directional microphone system may be modified or adapted based on the detection of the remote object.