Crossword Clue:

to deaden sound

AnswerCrossword Clue
SSSWorrying sound to a balloonist
ROARSound to fear in the savanna
OOFShot-to-the-solar-plexus sound
GRATENot sound good to the ears
SSSSound a biker doesn't want to hear
MACHIt's calculated relative to the speed of sound
SCAMSMost deals that sound too good to be true
WHIPFirst object made by humans to break the sound barrier