Accession Number:

AD0266342

Title:

WIDE BAND SOUND SOURCE FOR WADD SONIC FACILITY

Descriptive Note:

Corporate Author:

BOLT BERANEK AND NEWMAN INC CAMBRIDGE MASS

Personal Author(s):

Report Date:

1960-09-01

Pagination or Media Count:

1.0

Abstract:

The following were concluded regarding a wide band sound source a The gas-fuel powered wide ba d acoustic gener or i fea ible and probably practical in the 100 kw net po er range. here is no apparent reason why much higher power ratings coul not be considered b The optimum acoustic efficiency is obtained with tandem-type devices operating at high inlet charge density, low fuel energy, low compression ratio so as toAVOID EXCESSIVE EXHAUST TEMPERATURES. The airspring device is much less efficie t but can use high-energy fuels and high compression ratios c The ex aust temper tures c n be lowered by injection of secondary air at low close-toatmospheric pressure and d The discussion was based on acetylene but butane or coke-gas or methane would probably be satisfactory. There appears to be no advantage in the use of hydrogen which was disqualified because of its detonation characteristic . Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE