When we clap our hands, the sound produced is best described by Here p denotes the change in pressure from the equilibrium value.

When we clap, different regions of both the palms do not strike each other with the same pressure. Hence different regions of the palms produce different sounds having different pressure amplitudes, wave numbers and frequencies. So the pressure at a point is given as summation of pressures at that point at that instant. Hence, only option D is correct.

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