What is the role of the tympanic membrane?

What is the role of the tympanic membrane?

• A. It vibrates in response to pressure changes.
• B. It converts neural signals to mechanical energy.
• C. It amplifies cochlear signals.
• D. It produces sound waves.

Answer: (A)

The tympanic membrane serves as the first transducer in hearing, turning airborne sound pressure fluctuations into mechanical vibrations. When sound waves reach the ear canal, they cause the eardrum to vibrate; those vibrations drive the tiny middle-ear bones (ossicles) and set the energy into motion to move the fluid in the cochlea, eventually generating neural signals. It is not producing sound, nor converting neural signals to motion, nor amplifying cochlear signals by itself—the amplification and signal processing occur downstream in the cochlea and through the middle-ear mechanics.

The tympanic membrane serves as the first transducer in hearing, turning airborne sound pressure fluctuations into mechanical vibrations. When sound waves reach the ear canal, they cause the eardrum to vibrate; those vibrations drive the tiny middle-ear bones (ossicles) and set the energy into motion to move the fluid in the cochlea, eventually generating neural signals. It is not producing sound, nor converting neural signals to motion, nor amplifying cochlear signals by itself—the amplification and signal processing occur downstream in the cochlea and through the middle-ear mechanics.