Accession Number:

AD0711359

Title:

AIRSPEED INFLUENCE ON NOISE WITHIN FIXED- AND ROTARY-WING AIRCRAFT.

Descriptive Note:

Research rept. Jan 66-Oct 69,

Corporate Author:

SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s):

• Gasaway,Donald C.

Report Date:

1970-06-01

Pagination or Media Count:

21.0

Abstract:

The influence of increased motive power and airspeed on noise levels within 163 fixed- and rotary-wing aircraft is depicted in 9 noise-exposure envelopes. Increased power and airspeed resulted in increments in cockpit noise in all of these aircraft groups. Changes in acoustic spectra and speech interference are illustrated and described. Author

Descriptors:

• (*AIRCRAFT NOISE
• *AIRSPEED)
• COCKPITS
• SPEECH
• INTERFERENCE
• INTELLIGIBILITY
• PROPELLER NOISE
• ROTARY WINGS
• AIRPLANE ENGINE NOISE

Subject Categories:

• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE