period two
Sound Perception and
Rating Methods
notes
Response to Tones
Figure 21
Additionally, tones evoke a particularly strong response. Recall that a tone is a sound that occurs at a single frequency. Chalk squeaking on a blackboard, for example, produces a tone that is extremely irritating to many people.
Single-Number Rating Methods
I
INoise criteria (NC) curves
IRoom criteria (RC) curves
ISones
IPhons
Figure 22
Single-Number Rating Methods
The human ear interprets sound in terms of loudness and pitch, while electronic
With such a system, sound targets can be established for different environments. These targets aid building designers in specifying appropriate acoustical requirements that can be substantiated through measurement. For example, a designer can specify that “the background sound level in the theater
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