Explain how the human ear drum helps them to hear.
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1. Sounds enter the ear canal
Sound waves move through the ear canal and strike the eardrum.
2. The ear drum and bones of hearing vibrate
These sound waves cause the eardrum, and the three bones (ossicles) within the middle ear, to vibrate.
3. Fluid moves through the inner ear
The vibrations move through the fluid in the spiral shaped inner ear – known as the cochlea – and cause the tiny hair cells in the cochlea to move. The hair cells detect the movement and change it into the chemical signals for the hearing nerve.
4.Hearing nerves communicate to the brain
The hearing nerve then sends the information to the brain with electrical impulses, where they are interpreted as sound.
Sound waves move through the ear canal and strike the eardrum.
2. The ear drum and bones of hearing vibrate
These sound waves cause the eardrum, and the three bones (ossicles) within the middle ear, to vibrate.
3. Fluid moves through the inner ear
The vibrations move through the fluid in the spiral shaped inner ear – known as the cochlea – and cause the tiny hair cells in the cochlea to move. The hair cells detect the movement and change it into the chemical signals for the hearing nerve.
4.Hearing nerves communicate to the brain
The hearing nerve then sends the information to the brain with electrical impulses, where they are interpreted as sound.
Ammie999:
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◾ The human ear is an organ whose primary function is to hear a sound and to detect and analyze noise by transduction (sound waves are converted into the electrical impulses). In some mammals, it is also used for the sense of balance.
◾ The compressions in the air reach the outer ear called pinna which directs the sound to travel through the ear canal to reach the ear drum or tympanic membrane. Due to these compressions, the membrane starts vibrating. This thin membrane vibrates and relaxes depending on the amplitude of compression in air. The vibration is then passed to three bones in the ear connected to the ear drum: hammer, anvil and stirrup and is amplified about 20 times than the actual vibration.
◾ After the amplification by ear bones, this vibration is passed through the oval ear called cochlea. A liquid is present in the cochlea. When the vibrations are sent to this liquid, it creates waves and gets the electrical signal out of the cochlea. Now from cochlea it is sent to brain through the auditory nerve. Brain reads the electrical impulses and detects it as sound. We have an Eustachian tube at the bottom which connects the ear with the nasopharynx, a part of nose.
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Hope it helps..!!! ☺☺☺
______________
Here is ur answer:
________________
◾ The human ear is an organ whose primary function is to hear a sound and to detect and analyze noise by transduction (sound waves are converted into the electrical impulses). In some mammals, it is also used for the sense of balance.
◾ The compressions in the air reach the outer ear called pinna which directs the sound to travel through the ear canal to reach the ear drum or tympanic membrane. Due to these compressions, the membrane starts vibrating. This thin membrane vibrates and relaxes depending on the amplitude of compression in air. The vibration is then passed to three bones in the ear connected to the ear drum: hammer, anvil and stirrup and is amplified about 20 times than the actual vibration.
◾ After the amplification by ear bones, this vibration is passed through the oval ear called cochlea. A liquid is present in the cochlea. When the vibrations are sent to this liquid, it creates waves and gets the electrical signal out of the cochlea. Now from cochlea it is sent to brain through the auditory nerve. Brain reads the electrical impulses and detects it as sound. We have an Eustachian tube at the bottom which connects the ear with the nasopharynx, a part of nose.
______________________________
Hope it helps..!!! ☺☺☺
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Your answer is bit complicated ! :)
ohk,.. ^^"
if u would have told me to simplify the answer..i would have done.. anyways ..no probs..:)
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