Accession Number:

AD0773687

Title:

A Technique for Measuring the External Noise of a Moving Helicopter

Descriptive Note:

Technical memo.

Corporate Author:

HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Lince, Donald L.

Report Date:

1973-09-01

Pagination or Media Count:

74.0

Abstract:

A technique has been devised to measure the noise produced by a moving helicopter. The equipment used is easily portable, relatively simple, accurate and provides instant readout of aircraft speed and altitude. The sound pressure levels measured during the flyovers have been corrected to a constant 200-foot distance from the source and polar plots have been prepared showing the corrected sound pressure level by octave bands

Descriptors:

• *ACOUSTIC DETECTION
• *JET ENGINE NOISE
• ACOUSTIC MEASUREMENT
• FLIGHT MANEUVERS
• ACOUSTIC DETECTORS

Subject Categories:

• Helicopters
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE