Accession Number:
AD0712406
Title:
JET NOISE SUPPRESSION BY AN IMPEDANCE SHROUD,
Descriptive Note:
Corporate Author:
BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH
Personal Author(s):
Report Date:
1970-06-01
Pagination or Media Count:
26.0
Abstract:
Jet noise can be attenuated by shielding the observer from the noise sources with a sheet of fluid having a different acoustic impedance to the undisturbed atmosphere. The attenuation due to a heated sheet of gas lying on an arc centered on the axis of a subsonic jet was measured. The maximum noise reduction in certain frequency bands in this experiment was 10 dB. Author
Descriptors:
Subject Categories:
- Acoustics