strident

adjective

1. conspicuously and offensively loud; given to vehement outcry"blatant radios"
2. of speech sounds produced by forcing air through a constricted passage (as ‘f’, ‘s’, ‘z’, or ‘th’ in both ‘thin’ and ‘then’)
3. being sharply insistent on being heard"strident demands"
4. unpleasantly loud and harsh