period one
Fundamentals of Sound
notes
What is Sound?
IAudible emissions resulting from vibration of molecules within an elastic medium
IGenerated by vibrating surface or movement of a fluid
IIn buildings, it may be airborne or structure- borne
INoise is unwanted sound
Figure 3
What is Sound?
Sound is the audible emissions resulting from the vibration of molecules within an elastic medium. It is generated by either a vibrating surface or the movement of a fluid. In the context of building HVAC systems, this elastic medium can be either air or the building structure. For
Noise is different than sound. Sound is always present, but is not always obtrusive. Noise is defined as unwanted sound. Generally, people object to sound when it interferes with speech, concentration, or sleep.
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