Measurements of bone-conducted sound in the chinchilla external ear.

ABSTRACT: We measure bone-conduction (BC) induced skull velocity, sound pressure at the tympanic membrane (TM) and inner-ear compound-action potentials (CAP) before and after manipulating the ear canal, ossicles, and the jaw to investigate the generation of BC induced ear-canal sound pressures and their contribution to inner-ear BC response in the ears of chinchillas. These measurements suggest that in chinchilla: i.) Vibrations of the bony ear canal walls contribute significantly to BC-induced ear canal sound pressures, as occluding the ear canal at the bone-cartilaginous border causes a 10 dB increase in sound pressure at the TM (P_TM) at frequencies below 2 kHz. ii.) The contributions to P_TM of ossicular and TM motions when driven in reverse by BC-induced inner-ear sound pres

SUBMITTER: Bowers P 

PROVIDER: S-EPMC10767666 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature