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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.
There are two main properties of a regular vibration-the amplitude and the frequency-which affect the way it sounds. Amplitude is the size of the vibration, and this determines how loud the sound is.We have already seen that larger vibrations make a louder sound.here are two main properties of a regular vibration-the amplitude and the frequency-which affect the way it sounds. Amplitude is the size of the vibration, and this determines how loud the sound is. We have already seen that larger vibrations make a louder sound.