Title

Electronic Analog Of The Ear

Date

1963

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

AMRL TDR 63-60

Creator

Glaesser, E.

Caldwell, W. F.

Stewart, J. L.

Corporate Author

Santa Rita Technology Inc Menlo Park Calif

Laboratory

Biophysics Laboratory

Extent

72

Identifier

AD0411320

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(657)-11331

DoD Project

7233 - Biological Information Handling Systems and Their Functional Analogs

DoD Task

723301 - Biological Mechanisms for Signal Analysis

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

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.

Report Availability

Full text available

Date Issued

1963-06

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource