Chapter hvac engineering Fundamentals: Part 1 Introduction

20.4
Sound and Vibration Transmission
In HVAC practice, the sound and vibration sources are the elements
of the HVAC system: fans, pumps, compressors, air flowing in ducts,
and water and steam flowing in pipes. The paths for transmission are
Engineering Fundamentals: Part 5
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Engineering Fundamentals: Part 5
489
TABLE
20.2 Center Approximate Cutoff Frequencies for Octave and One-Third
Octave Band Series Frequency, Hz
SOURCE
: Copyright 1997, American Society of Heating, Refrigerating and Air Conditioning
Engineers, Inc., www.ashrae.org. Reprinted by permission from ASHRAE Handbook,
1997
Fundamentals,
Ch. 7, Table 1. (Original source: ANSI Standard 51.6.)
the ducts, pipes and the building structure. The receivers are the peo-
ple in the building or vibration-sensitive equipment.