Frequency response for electromotility of isolated outer hair cells of the guinea pig.
Frequency and impulse responses were determined for isolated guinea pig outer hair cells by electrically stimulating the cells between two wire electrodes with white noise. Cells were attached to the bottom of a small culture dish at one end while the other end was freely moving. Results have the character of a damped second-order system, with a cut-off frequency of approximately 7 kHz. Correspondingly, impulse responses show a single narrow peak roughly 50 microseconds wide and have the shape of the impulse response for a critically damped harmonic oscillator.
Wit
H P
HP
Department of Experimental Otolaryngology, University Hospital, Groningen, The Netherlands. h.p.wit@med.rug.nl
van Dijk
P
P
Segenhout
H M
HM
D000161:Acoustic Stimulation; D000818:Animals; D002465:Cell Movement / Q000502:physiology*; D002469:Cell Separation; D003051:Cochlea / Q000166:cytology / Q000502:physiology; D004558:Electric Stimulation; D006168:Guinea Pigs; D018072:Hair Cells, Auditory, Outer / Q000166:cytology* / Q000502:physiology; D009994:Osmolar Concentration