loudThe sirens were loud.
noisyOur neighbours are very noisy.
deafeningThe music was deafening.
explosiveThere was an explosive clap of thunder.
piercingShe let out a piercing scream.
ear-piercingShe couldn't stand the children's ear-piercing screams.
ear-splittingThe explosions of the fireworks were ear-splitting.
shrillA shrill whistle sounded.
boomingBooming music kept us up all night.
(at) full blastThe TV was on full blast.