stridency

stridency
    n 1: having the timbre of a loud high-pitched sound [syn:
         {shrillness}, {stridence}, {stridency}]
    

40 Moby Thesaurus words for "stridency":
      acerbity, acidity, acridity, acrimony, acuteness, arguteness,
      astringency, bite, bitterness, causticity, creakiness, edge,
      fierceness, grip, harshness, highness, keenness, mordacity,
      mordancy, pipingness, poignancy, point, reediness, rigor,
      roughness, screechiness, severity, sharpness, shrillness, sting,
      stridence, stridor, stridulousness, stringency, tartness, teeth,
      trenchancy, vehemence, violence, virulence