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Main Title An evaluation of high level noise and its reduction in a 3000 BTU/HR gasoline-engine-powered field refrigeration unit.
Other Authors
Author Title of a Work
Brown, William C.
Publisher Defense Technical Information Center,
Year Published 1975
Report Number USAMC-ITC-02-08-75-403; AD-A009 314
OCLC Number 907643936
Subjects Air Condition, Heating, Lighting & Ventilating ; Civil Engineering ; Noise reduction ; Engine noise ; Refrigeration systems ; Sources ; Measurement ; Fans ; High intensity ; Sound pressure ; Electric motors ; Sound analyzers ; Acoustic insulation ; Compressor noise
Library Call Number Additional Info Location Last
EKBD  AD-A009 314 Microfiche collection Research Triangle Park Library/RTP, NC 04/27/2015
Collation 73 pages.
Notes "AD-A009 314." "USAMC-ITC-02-08-75-403." "Filmed 6-5-75 NTIS." Microfiche.
Contents Notes The report describes the results of research intended to determine the sources of high level airborne noise transmitted from a 3000 BTU/hr mobile refrigeration unit using an air-cooled engine as the prime mover. An electric motor was adapted to power the unit and the major noise producing components of the system (compressor, motor, fan) were analyzed separately to determine their contribution to the overall noise. Noise measurements with a sound level meter and octave band analyzer indicated the gasoline engine to be the major source of high level noise. A significant reduction of noise levels was accomplished by addition of sound suppression materials and relocation of the engine exhaust outlet. Design changes which would further reduce engine noise emission are recommended for future procurement of the mobile refrigeration unit.
Place Published Ft. Belvoir
Corporate Au Added Ent ARMY MATERIEL COMMAND TEXARKANA TEX INTERN TRAINING CENTER.; United States. National Technical Information Service.
PUB Date Free Form 1975
BIB Level m
Medium microform
Content text
Carrier microfiche
Cataloging Source RDA
OCLC Time Stamp 20150420130709
Language eng
Origin OCLC
Type CAT
OCLC Rec Leader 02674nam 2200541Ki 45020