"Shrill" is an adjective that describes a high-pitched sound or voice that is loud and sharp. It can be used to refer to something or someone that sounds very loud, intense, or piercing. Full definition
The gulls have seen him too, for six of them come from nowhere and start circling with shrill cries waiting impatiently for the bass to drive the bait to the surface. (si.com)
Unfortunately, in times of turmoil they're often drowned out by shriller voices that seem intent on scaring the bejeezus out of investors with dire pronouncements or titillating predictions of Armageddon. (realdealretirement.com)
Redlined at 9000 rpm, where the electronic tachometer changes color from snow white to devil red, the V - 10 sounds as shrill as a MotoGP bike or a Formula 1 racer. (automobilemag.com)