Sensory, Attentional And Perceptual Processes — Psychology STD 11 Humanities — Question

• Sound waves vary in amplitude as well as in wavelength.
• The amplitude of sound wave is represented as the distance of the crest or trough from its mean position.
• Sound waves are formed due to alternate compression and decompression of air molecules and wavelength is the distance between two crests.
• Sound waves are described in terms of their frequency, which is measured in terms of cycles per second. Its unit is called HERTZ.

Frequency and wavelength have an inverse relationship. When the wavelength increases, the frequency decreases and when the wavelength decreases, the frequency increases.