Which property of vibrations determines the pitch of the sound? Explain giving some examples.

The frequency determines the shrillness or pitch of a sound. If the frequency of vibrations is higher we say that the sound has a higher pitch. If the frequency of vibration is lower, we say that the sound has a lower pitch. For example, the drum vibrates with a low frequency. Therefore, it produces a low pitched sound. On the other hand, a whistle has a high frequency and, therefore, produces a sound of higher pitch. A bird makes a high pitched sound whereas a lion makes a low pitched roar. However, the roar of a lions is very loud while the sound of bird is quite feeble.