Question

which wave property determines : (a) loudness (b) pitch

Answer 1

(a) $\textbf{amplitude}$ : loudness of a sound depends on its amplitude.

If the amplitude of a sound is large, then the sound produced will also be loud.

(b) $\textbf{frequency}$ :- pitch of a sound depends on its frequency.

A sound is considered as high pitch sound when frequency of sound is high.

Answer 2

"Loudness - Amplitude

Wave amplitude defines the maximum distance a wave can travel from its mean equilibrium position. The sound loudness is resolved by the amplitude of that wave. With increase in amplitude, the sound wave's loudness increases.

Pitch - Frequency

Wave frequency refers to numberical value of waves that pass through a particular point in one second. In terms of sound waves, frequency is defined as the number of oscillations per seconds which is also known as the pitch. Pitch increases with increase in sound wave's frequency."