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A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats

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Real-Time Multirate Multiband Amplification for Hearing Aids.

Alice Sokolova^1,2, Dhiman Sengupta³, Martin Hunt¹

¹Department of Electrical and Computer Engineering, UC San Diego, La Jolla, CA 92093, USA.

IEEE Access : Practical Innovations, Open Solutions

|June 13, 2023

Summary

This summary is machine-generated.

This study introduces a new real-time hearing aid system with improved frequency resolution and precise gain control. The advanced amplification technology aims to enhance sound processing for better hearing aid performance.

Keywords:

Hearing aids auditory system channelization digital signal processing embedded software open source hardware real-time systems research initiatives speech processing wearable computers

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Area of Science:

Audiology
Signal Processing
Biomedical Engineering

Background:

Hearing loss significantly impacts quality of life, with many users dissatisfied with current hearing aid performance.
Modern hearing aids primarily use amplification, often employing dynamic range compression across different frequency bands.
The frequency-dependent nature of the cochlea necessitates sophisticated signal processing for effective hearing loss compensation.

Purpose of the Study:

To present a novel real-time multirate multiband amplification system for hearing aids.
To improve the accuracy and performance of audio compression in hearing devices.
To address limitations in current hearing aid technology regarding frequency resolution and gain adjustment.

Main Methods:

Developed a multirate channelizer to divide audio signals into eleven standard audiometric frequency bands.
Implemented an automatic gain control (AGC) system for precise steady-state and dynamic audio compression.
Designed the system to meet ANSI standards for hearing aid performance.

Main Results:

The spectral channelizer achieved high frequency resolution with low latency (5.4 ms) and improved complexity by approximately 14x.
The automatic gain control system provides a closed-form solution for meeting specified attack and release times.
The system demonstrates enhanced frequency resolution and gain adjustment accuracy.

Conclusions:

The developed system offers a significant advancement in hearing aid signal processing technology.
Increased frequency resolution and precise gain control enable more accurate fulfillment of audiometric hearing aid prescriptions.
This technology has the potential to improve user satisfaction with hearing aid performance.