Digital Telephone Equalizer for Deaf People

Thesis for the degree in Electronic Engineering

By Igor Trevisan, 1999

Supervisor:   Nicola Bergamin at BLUEWIND in Castelfranco V.to, Italy

Introduction

Algorithm  

Hardware 

Program

Evolution

Literature   

Abstract

Deafness, expecially in the industrialized countries, is a very relevant and widespread phenomenon; we just report the fact that deafness is the fourth invalidant permanent desease for man (by Hearing International). We have then to consider that things for deaf people get even worse when they have to communicate using the telephone.

The goal of the thesis was to achieve a digital elaboration of the telephone signal able to get a better intelligibleness of the speak signal for people who can't normally hear.

This experimental work relied on an Analog Devices ADSP2181 Digital Signal Processor platform, with input and output audio interfaces.