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2.2 FACTORS AFFECTING PROPAGATION OF SOUND There are several important factors, which affect the propagation of sound: geometric spreading, atmospheric effects, and surface effects. These are discussed separately below. 2.2.1 Geometric Spreading This refers to the spreading of sound energy as a result of the expansion of the wave fronts.
pitch is directly related to the frequency of the sound wave. So if the frequency increases then the pitch of the sound wave also increases. Amplitude affects the loudness of the sound wave. So if the sound wave is loud it means it has a higher amplitude.