Trane TRG-TRC007-EN manual period one, What is Sound?, Fundamentals of Sound

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 structurally-borne sound to become audible, however, it must first become airborne.

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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