Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Electronic Analog Of The Ear

Report Number: AMRL TDR 63-60
Author: Glaesser, E.
Author: Caldwell, W. F.
Author: Stewart, J. L.
Corporate Author: Santa Rita Technology Inc Menlo Park Calif
Laboratory: Biophysics Laboratory
Date of Publication: 1963-06
Pages: 72
Contract: AF 33(657)-11331
Project: 7233 - Biological Information Handling Systems and Their Functional Analogs
Task: 723301 - Biological Mechanisms for Signal Analysis
AD Number: AD0411320

Abstract:
An elctrical analog of the human ear is described, which includes the external and middle ear, the cochlea, and part of the the neutral structure of the cochlea and the higher auditory centers of the central nervous system. The analog is devel oped on the basis of a one-to-one relation be tween physiological and ecal parameters. The electrical analog cochlea is realized as a 36-section, lumped-parameter, nonuniform trans mission line. The neural structure of the cochlea and auditory portions of the central nervous system are modeled functionally by means of 36 detecting and filtering amplifiers, termed loudness converters. The spatial array of the 36 loudness converter outputs is a neutral equivalent pattern of basilar membrane motion. A pattern theory of loudness detection and sound recognition is discussed. On the basis of this theory, the analog ear exhibits a threshold of hearing curve which is approximately the same as that for a human. The important mechanical variable is found to be the velocity of the basilar membrane. The neural volley effect is included. Studies indicate that sound recogni tion with the analog is similar to that for a human.


Provenance:
Lockheed Martin Missiles & Fire Control
Download this report

(PDF, 1.61 MB, 72 pages)

Other options for obtaining this report

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a full-image download of the report, exists at DTIC

Via National Technical Information Service:
This report may have been digitized and made freely available for public download, or made publicly available for purchase by the National Technical Information Service through their online database, the National Technical Reports Library

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
The inside cover of this report indicates that it was released for public sale