Time-domain and frequency-domain effects of tensor tympani contraction on middle ear sound transmission in gerbil.

ABSTRACT: The middle ear is a high-fidelity, broadband impedance transformer that transmits acoustic stimuli at the eardrum to the inner ear. It is home to the two smallest muscles in mammalian species, which modulate middle ear transmission. Of this pair, the function of the tensor tympani muscle (TTM) has remained obscure. We investigated the acoustic effects of this muscle in young adult gerbils. We measured changes in middle ear vibration produced by pulse-train-elicited TTM contraction - in the time-domain with a click stimulus and in the frequency-domain with multitone zwuis stimuli. In our click experiments, there was generally a small reduction in the primary peak of the response and a slight increase in the subsequent ringing, but there was essentially no change in the delay of the click re

SUBMITTER: Gallagher L 

PROVIDER: S-EPMC8113157 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature