eardrum
Definition
An eardrum is a thin, delicate membrane that separates the outer ear from the middle ear. It is also known as the tympanic membrane. The eardrum is about the size of a postage stamp, and it is made up of three layers: the outer layer, the middle layer, and the inner layer.
The outer layer of the eardrum is made up of skin. The middle layer of the eardrum is made up of connective tissue. The inner layer of the eardrum is made up of mucous membrane.
The eardrum vibrates when sound waves hit it. These vibrations are then transmitted to the middle ear by three small bones: the malleus, the incus, and the stapes. The middle ear bones amplify the vibrations and transmit them to the inner ear.
The inner ear is a complex structure that contains the cochlea, the organ of hearing. The cochlea is a spiral-shaped chamber that is filled with fluid. When the vibrations from the middle ear reach the cochlea, they cause the fluid to move. This movement stimulates the hair cells in the cochlea, which send signals to the brain. The brain interprets these signals as sound.
The eardrum is an important part of the hearing process. It helps to amplify sound waves and transmit them to the inner ear. If the eardrum is damaged, it can cause hearing loss.
How can the word be used?
The sound of the explosion ruptured my eardrum.
Different forms of the word
Noun: eardrum, tympanic membrane.
Adjective: tympanic.
Etymology
The word "eardrum" comes from the Latin word tympanum, which means "drum". It is made up of the two Latin words tympan (drum) and -um (noun ending).
Question
Why is it important to protect your ears from sound?
AQA Science Exam Question and Answer
Question:
Explain the role and importance of the eardrum in the process of hearing. Describe the structure of the eardrum and how it responds to sound waves. Provide examples of potential issues or damage that can affect the eardrum and their impact on hearing.
Answer:
The eardrum, also known as the tympanic membrane, plays a crucial role in the process of hearing. It is a thin, dome-shaped membrane located at the end of the ear canal, separating the outer ear from the middle ear. When sound waves enter the ear canal, they strike the eardrum, causing it to vibrate.
These vibrations are then transmitted to the three small bones in the middle ear: the hammer, anvil, and stirrup. The movement of these bones amplifies the vibrations and sends them to the fluid-filled cochlea in the inner ear.
Issues or damage to the eardrum can significantly affect hearing. Conditions like a perforated eardrum, caused by infection, injury, or sudden changes in air pressure, can lead to hearing loss or reduced sensitivity to sound. Timely medical intervention is essential to address such issues and protect the delicate mechanism of the eardrum, ensuring optimal hearing function.