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Hearing

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

Design Example

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...

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Related Experiment Video

Updated: Dec 31, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages

Published on: March 24, 2023

Multi-programmable Hearing Aid.

Stephan Mangold¹, Maud Eriksson-Mangold², Björn Israelsson³

¹Diaphon/3M, Mölndal, Sweden.

Acta Oto-Laryngologica

|January 8, 2020

Summary

This summary is machine-generated.

This study introduces the MemoryMate®, a multi-programmable hearing aid offering eight distinct settings for diverse listening needs. A complementary Master-Fit® system aids in personalized hearing aid adjustments and data management.

Keywords:

computerized fitting digital analog hybrid expert system multi-channel compression

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Robotic Cochlear Implantation for Direct Cochlear Access

Robotic Cochlear Implantation for Direct Cochlear Access

Published on: June 16, 2022

Area of Science:

Audiology
Hearing Aid Technology
Biomedical Engineering

Background:

Hearing aid fitting presents challenges in optimizing settings for varied acoustic environments.
Existing hearing aids often lack flexibility to adapt to diverse listening situations.

Purpose of the Study:

To develop a digitally controlled, behind-the-ear hearing aid with a flexible analog signal processor and memory.
To create a system enabling hearing-impaired individuals to select from eight distinct hearing aid configurations.
To introduce a novel hearing aid as a valuable research instrument.

Main Methods:

Development of the MemoryMate® multi-programmable hearing aid with a digitally controlled analog signal processor.
Creation of the Master-Fit® hearing evaluation and recommendation system utilizing an IBM PS/2 computer.
Integration of prescriptive fitting methods and real ear measurements within the Master-Fit® system.
Implementation of client database management capabilities.

Main Results:

The MemoryMate® hearing aid allows users to switch between eight different programmed fittings.
The Master-Fit® system facilitates precise hearing aid adjustments and client data management.
Preliminary clinical study results from 1988 are presented, demonstrating the system's potential.

Conclusions:

The MemoryMate® represents a significant advancement in hearing aid technology, offering unprecedented flexibility.
The Master-Fit® system provides a comprehensive solution for hearing aid fitting and management.
This multi-programmable hearing aid serves as a powerful new tool for audiological research.