The Collaborative International Dictionary of English v.0.48:
high-pitched \high-pitched\ adj.
1. high in pitch or frequency; -- used of sounds and voices.
Opposite of low. [Narrower terms: adenoidal, pinched,
nasal; altissimo; alto; countertenor, alto;
falsetto; peaky, spiky; piping; shrill, sharp;
screaky, screechy, squeaking, squeaky, squealing;
soprano, treble; sopranino; tenor]
2. set at a sharp or high angle or slant; as, a high-pitched
Syn: steeply pitched, steep.
[WordNet 1.5] high-power