Question

The _________ of sound is that characteristic which enables us to distinguish one sound from another having the same pitch and loudness.

Answer 1

1. Timbre is the quality of a sound.
2. This can be used to differentiate the sounds of the same frequency and loudness.
3. Quality or timbre is depended on the material or the source from which it is produced.

Hence, The quality or timbre of sound is that characteristic which enables us to distinguish one sound from another having the same pitch and loudness.