Chapter hvac engineering Fundamentals: Part 1 Introduction

20.4.2
Transmission through
the building structure
Most equipment-generated sound—from fans, pumps, and com-
pressors—is transmitted through the building structure as vibration
and is heard or felt by the receiver. The path may not be obvious and
may be complex, as in Fig. 20.3. In this real example, a refrigeration
compressor in the basement of a church was properly isolated from
the floor. But vibration energy was transmitted several feet through
the air to a 12-in concrete wall. The wall had a natural frequency
Engineering Fundamentals: Part 5
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