screechy

adj

1. Resembling a screech.

   “a screechy sound”

   “Where these Atlantics fell from acoustic grace, however, was in their feeble screechy little whistle, so different from the N.B.R. mellow standard pattern.”

2. Given to screeching.

   “She has a screechy voice that really grates on my nerves, like a dentist's drill.”