Title

The Use of Reflectors to Shape a Sound Field

Date

1971

Index Abstract

Not Available

Photo Quality

Undetermined

Report Number

AFFDL TR 70-97

Creator

Manning, Jerome E.

Moore, James A.

Corporate Author

Bolt, Beranek and Newman, Inc.

Laboratory

Air Force Flight Dynamics Laboratory

Extent

126

Identifier

AD0883946

Access Rights

Export Controls

Distribution Classification

1

Contract

F33615-69-C-1384

DoD Project

4437

DoD Task

443701

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

AFFDL LTR

Distribution Change Action Date

12/17/1998

Distribution Conflict

No

Abstract

The use of reflectors to control the distribution of the Sound Pressure Level (SPL) in sonic test chambers is investigated. The goal is to obtain more realistic SPL distributions on the test object. It is concluded that the use of reflectors will not increase the SPL on a test object unless the reflector and test object are in the near field of the sound generators. The results of the study are applied to the Air Force Flight Dynamics Laboratory's (AFFDL) Sonic Fatigue Facility at Wright-Patterson Air Force Base. Design charts are presented that relate predicted SPL distributions to reflector size and positioning.

Report Availability

Not available via Contrails

Date Issued

1971-03

Index In

DTIC

Type

report