Accession Number : AD0711516

Title :   EFFECT OF GROUND REFLECTIVE AND OTHER MICROPHONE MOUNTING CONDITIONS ON SONIC BOOM MEASUREMENTS.

Descriptive Note : Final rept.,

Corporate Author : GENERAL APPLIED SCIENCE LABS INC WESTBURY N Y

Personal Author(s) : Abele,Manlio ; Tomboulian,Roger ; Peschke,William ; Dantuono,Daniel

Report Date : MAY 1970

Pagination or Media Count : 72

Abstract : An investigation of the effects of various ground surfaces on the character of a reflected N-wave was performed. The response of an FAA field test microphone was compared with that of a standard condenser microphone and the response capability of an FAA transient data recorder was determined. The effect of microphone height and wave incidence angle with respect to both a rigid reference surface and several ground surfaces was evaluated in a sonic boom simulator. The ground surfaces tested included asphalt, medium density grass, spaded soil, coarse aggregate, etc. Two different N-wave signatures were used in the tests. (Author)

Descriptors :   (*SONIC BOOM, MEASUREMENT), REFLECTIVITY, SURFACE PROPERTIES, MICROPHONES, SOILS, ASPHALT, GLASS TEXTILES

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE