strident

conspicuously and offensively loud; given to vehement outcry; "blatant radios"; "a clamorous uproar"; "strident demands"; "a vociferous mob"

of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')

being sharply insistent on being heard; "strident demands"; "shrill criticism"

unpleasantly loud and harsh