Which structure directly channels sound to the tympanic membrane?

Which structure directly channels sound to the tympanic membrane?

• A. Pinna
• B. External Auditory Canal
• C. Tympanic Membrane
• D. Malleus

Answer: (B)

The external auditory canal directly channels sound to the tympanic membrane. Waves enter through the ear opening and travel down this narrow passage, which guides the energy right to the eardrum, causing it to vibrate. The canal ends at the tympanic membrane, making it the direct conduit for sound energy. The pinna helps collect and localize sound but doesn’t directly channel it to the eardrum. The tympanic membrane is the vibrating boundary between outer and middle ear, not a channel. The malleus is one of the middle-ear bones that transmits vibrations onward, but it doesn’t serve as the initial conduit for sound to reach the eardrum.

The external auditory canal directly channels sound to the tympanic membrane. Waves enter through the ear opening and travel down this narrow passage, which guides the energy right to the eardrum, causing it to vibrate. The canal ends at the tympanic membrane, making it the direct conduit for sound energy.

The pinna helps collect and localize sound but doesn’t directly channel it to the eardrum. The tympanic membrane is the vibrating boundary between outer and middle ear, not a channel. The malleus is one of the middle-ear bones that transmits vibrations onward, but it doesn’t serve as the initial conduit for sound to reach the eardrum.