The opening into the ear is about an inch long, or a little more, and is separated from that part of the ear within, which is known as the middle ear, by the eardrum membrane.
The eardrum is not absolutely essential to hearing, but it is of great importance to exclude sources of irritation, dust, water, and germs which are likely to set up middle-ear trouble.
This serves to drain mucus from the middle ear, and also to equalize the air pressure on the eardrum so that the pressure within the middle ear shall be the same as that without.
What do you think of the efficiency of aneardrum situated on the surface of the body?
What are the advantages in having the eardrumat the bottom of a canal?
Overpressure lower than those in Table A-2 can cause nonlethal injuries such as lung damage and eardrum rupture.
Lung damage is a relatively serious injury, usually requiring hospitalization, even if not fatal; whereas eardrum rupture is a minor injury, often requiring no treatment at all.
The threshold level foreardrum rupture is around 0.
When sounds enter the ear they cause the eardrum to tremble or vibrate, and this excites the nerve of hearing that is behind the eardrum.
When sounds strike the eardrum it vibrates and excites the nerve of hearing.
When the ear specialist wants to examine the eardrum he thrusts a small metal tube into the canal.
Its walls are ordinarily collapsed, so it is not an open passage, but every time one swallows the tube is pulled open, thus allowing differences in air pressure on the two sides of the eardrum to equalize.
The eardrum does not act directly upon the sensitive hearing apparatus, but its vibrations are transmitted across a space known as the middle ear.
Interference with the action of the eardrum may be due to the partial destruction of the drum itself.
Whenever one ascends a high hill quickly, as by train or automobile, or even in going to the top of a high building by elevator, the difference in air pressure behind and in front of the eardrum can be felt.
As they move away they make a little vacuum there and the eardrum puffs out.
That same thing happens all along the line until the air molecules next your ear start back and give your eardrum a chance to expand outward.
When these air molecules affect your eardrum you hear just what you would have heard if you had been right there beside the transmitter.
So do the adjacent molecules of air and so does the eardrum of a listener.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "eardrum" in a variety of sentences. We hope that you will now be able to make sentences using this word.
