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Document ID (ISN)35116
CIS number 81-384
ISSN - Serial title 0002-8894 - American Industrial Hygiene Association Journal
Year 1980
Convention or series no.
Author(s) Garrison R.P., Byers D.H.
Title Noise characteristics of circular nozzles for high velocity/low volume exhaust ventilation.
Bibliographic information Oct. 1980, Vol.41, No.10, p.713-720. Illus. 4 ref.
Abstract Noise characteristics of nozzles for average face velocities of 25-175m/s were studied. Design variations consisting of 7 profile shapes with an inside diameter of 2.54cm, and 5 plain profiles of 1.27-3.81cm inside diameter were examined. Maximum noise level was reached at less than maximum face velocity with all nozzles. At maximum face velocity there was a pronounced fall in high-frequency noise, with a shift in peak frequency from 4000 to 2000Hz. Variations in nozzle shape and size had significant effect on noise levels. See also a related abstract in section 100, "Heating, ventilation".
Descriptors (primary) noise; airflow noise; ventilation design; exhaust ventilation; nozzles
Descriptors (secondary) comparative study; aerodynamic shape
Document type D - Periodical articles
Subject(s) Noise, hearing and vibration
Broad subject area(s)
Browse category(ies) Ventilation
Compressed gases and pressure vessels
Noise