Which sounds can be heard safely by humans without
risking damage to the ear? Check all that apply.
O
rustling leaves
normal conversation
vacuum cleaner
front row at a rock concert
jet takeoff

These sounds can be heard safely by humans without risking permanent hearing loss:

-- rustling leaves . . . . . Yes

-- normal conversation  . . . . . Yes

-- vacuum cleaner  . . . . . Yes IF it's on the floor and you're standing up.

-- front row at a rock concert . . . . . No

-- jet takeoff . . . . . Yes BUT only if you're at least a mile away from the jet.