General qualities

Quiet/Loud
Low/High
Short/Long
Close/Distant
Non Dynamic/Dynamic
Tonal/Noisy
Natural/Artificial

Timbre

Dull/Bright
Smooth/Rough
Dry/Resonnant
Non Nasal/Nasal
Non Rich/Rich
Non Round/Round
Warm
Strident
Metallic

Morphology

Fast/Slow Attack
Fast/Slow Release
Crescendo/Decrescendo
Ascending/Descending
Constant/Fluctuating
Continuous/Discontinuous

words4sounds.speak (en)

Dull/Bright

The attributes dull and bright refer to the amount of high-frequency energy perceived within a sound. A dull sound has a low amount of high-frequency components. The term muffled is also used. A bright sound contains a substantial amount of high-frequency components. The term sharp is also used.

Musical instruments Female/Male voices Environmental sounds Simple sounds Complex sounds