Bone-conduction sound transmission bypasses the outer ear by delivering energy directly to which parts?

Bone-conduction sound transmission bypasses the outer ear by delivering energy directly to which parts?

• A. The temporal bone and cochlear fluids.
• B. The tympanic membrane and ossicles.
• C. The Eustachian tube and oval window.
• D. The pinna and ear canal.

Answer: (A)

Bone-conduction sound transmission bypasses the outer ear by vibrating the skull so the energy reaches the inner ear directly. The skull, especially the temporal bone, transmits these vibrations into the cochlea, where the cochlear fluids (perilymph and endolymph) carry the energy. Those fluid movements deflect the basilar membrane and stimulate hair cells, producing neural signals. That’s why the correct path is the temporal bone to the cochlear fluids. The other structures listed aren’t the primary transmission path in bone-conduction: the tympanic membrane and ossicles belong to the middle ear and are bypassed; the pinna and ear canal are outer-ear components; the Eustachian tube is involved in pressure regulation, not energy transmission; while the oval window is part of how inner-ear energy is transferred, the key concept is energy delivery to the temporal bone and cochlear fluids.

Bone-conduction sound transmission bypasses the outer ear by vibrating the skull so the energy reaches the inner ear directly. The skull, especially the temporal bone, transmits these vibrations into the cochlea, where the cochlear fluids (perilymph and endolymph) carry the energy. Those fluid movements deflect the basilar membrane and stimulate hair cells, producing neural signals. That’s why the correct path is the temporal bone to the cochlear fluids.

The other structures listed aren’t the primary transmission path in bone-conduction: the tympanic membrane and ossicles belong to the middle ear and are bypassed; the pinna and ear canal are outer-ear components; the Eustachian tube is involved in pressure regulation, not energy transmission; while the oval window is part of how inner-ear energy is transferred, the key concept is energy delivery to the temporal bone and cochlear fluids.