Title

Design and Performance of a 15 KW Wide Band Acoustic Facility

Date

1966

Index Abstract

Not Available

Photo Quality

Complete

Report Number

AFFDL TR 66-8

Creator

Hankel, Keith M.

Henderson, John P.

Corporate Author

Air Force Flight Dynamics Laboratory

Laboratory

Air Force Flight Dynamics Laboratory

Extent

62

Identifier

AD0634904

Access Rights

Distribution of this document is unlimited.

Distribution Classification

1

Contract

Laboratory Research - No Contract

DoD Project

1309; 4437

DoD Task

130901; 443705

DTIC Record Exists

No

Distribution Conflict

No

Date Modified

Scanned by request 12/19/2012 submitted by the National Aeronautics and Space Administration (NASA) (Government Agency - Domestic)

Abstract

Details of the design and performance of a wide band, high intensity, acoustic test facility are presented. The wide band siren, horn network, sound isolation room, noise measurement and analysis instrumentation, input power requirements, and measured performance characteristics of the facility are described. The problem of the presence of several discrete frequency peaks in the spectrum of the original siren configuration is discussed along with techniques which were investigated to improve the spectrum. Frequency modulation fo the rotor speeks is shown to result in a relatively smooth, continous random spectrum. The limited spectrum shaping capabilities of the siren are discussed. Recommendations are made for improvements that could be incorporated into future design of sirens of this type.

Report Availability

Full text available

Date Issued

1966-03

Provenance

Bombardier/Aero

Type

report

Format

1 online resource