Timbre (noun)

The characteristic quality of a sound, independent of its pitch and loudness, that distinguishes different types of sound production, such as voices or musical instruments.

Origin:

Mid 19th century: from french, literally "timber".

Examples:

1. The timbre of her voice was sweet and melodious.
2. The timbre of the cello is deep and rich.
3. The timbre of the flute is bright and clear.
4. The timbre of the trumpet is bright and bold.
5. The timbre of the saxophone is warm and smooth.