Title

Methods of Flight Vehicle Noise Prediction

Date

1958

Index Abstract

Not Available

Photo Quality

Not Needed

Report Number

WADC TR 58-343

Creator

Franken, Peter A.

Kerwin, Edward M., Jr.

Corporate Author

Bolt Beranek and Newman Inc.

Laboratory

Wright Air Development Center

Extent

191

PB Number

PB151827

NTRL Accession Number

AD205776

Identifier

AD0205776

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-5274

DoD Project

1370

DoD Task

13786

DTIC Record Exists

No

Distribution Change Authority Correspondence

AFWAL LTR

Distribution Conflict

Fix

Abstract

Detailed engineering procedures are presented for estimating sound pressure levels on or within a flight vehicle. The report is oriented for use by the aircraft engineer in making preliminary estimates of noise levels on or in a vehicle, when the vehicl is still in the design stage. Therefore, the proceedures are expressed in terms of general parameters (such as mechanical power, typical dimensiions, forward speed) which may be obtained to a satisfactory degree of accuracy long before flight testing.The first step in the procedure is the estimation of noise levels exterior to the vehicle. Contributions from the various sources of noise that may be encountered are estimated. The effects of forward speed and altitude on exterior noise levels are considered in some detail.Next, the basic noise-transmitting properties of panel structures are studied. The effects of coincidences, resonances, damping, etc., are included.Finally, the particular vehicle geometry of interest is considered. The source and transmission properties already determined can then be combined, with appropriate geometrical corrections for the character of the receiving space, to yield the desired estimates of the interior noise levels.Several examples are worked out in detail to illustrate the application of the report procedures to typical vehicle configurations.

Report Availability

Full text available

Date Issued

1958-11

Provenance

Jim Kinney

Type

report

Format

1 online resource