So do the adjacent molecules of air and so does the eardrum of a listener.
When sounds strike the eardrum it vibrates and excites the nerve of hearing.
Interference with the action of the eardrum may be due to the partial destruction of the drum itself.
When the molecules of air next your ear receive the push they in turn push against your eardrum.
As they move away they make a little vacuum there and the eardrum puffs out.
Way back inside the ear is a little curtain, or eardrum, made of a thin membrane.
Monsieur Le Grand drummed till my own eardrum was nearly cracked.
There was no speckle of light to classify and ignore, no susurrus of air molecules raining against the eardrum.
If a shell goes off too near you and the eardrum suffers, Dr. McKernon will be on the job to find out if he can't make a new one.
Then, once more the powder burned her cheek and the eardrum was numbed under an explosion.