Actively and Passively Generated Acoustic Distortion at 2f1-f2 in Rabbits
Upon stimulation of the mammalian ear by two tones of frequencies f1 and f2, distortion-product otoacoustic emissions (DPOAEs) can be measured at 2fl-f2 in the ear canal. These DPOAEs are vulnerable to cochlear insult; in small mammals 2f1-f2 DPOAEs below stimulus levels of 60–70 dB SPL disappear more rapidly post mortem, and are considerably more vulnerable to traumas such as asphyxia and aminoglycoside poisoning, than those above this level (Schmiedt & Adams, 1981; Kemp & Brown, 1984; Schmiedt, 1986; Lonsbury-Martin et al., 1987; Brown et al., 1989).
KeywordsGrowth Function Stimulus Level Ratio Function Frequency Separation Level DPOAE
Unable to display preview. Download preview PDF.
- Brown, A.M. (1987) Acoustic distortion from rodent ears: A comparison of responses from rats. guinea pigs and gerbils. Hear. Res. 31. 25-38.Google Scholar
- Brown, A.M., McDowell. B. and Forge. A. (1989) Acoustic distortion products can be used to monitor the effects of chronic gentamicin treatment. Hear. Res. 42. 143-156.Google Scholar
- Fahey, P.F. and Allen, J.B. (1986) Characterization of cubic intermodulation distortion products in the cat external auditory meatus. In: Peripheral Auditory Mechanisms (Eds: Allen, I.B., Hall. J.L.. Hubbard, A.E., Neely. S.T. and Tubis. A.) Springer-Verlag. New York. pp. 314 - 321.CrossRefGoogle Scholar
- Fahey, P.F. and Allen. J.B. (1988) Power law features of acoustic distortion product emissions. In: Basic Issues in Hearing (Eds: Duifhuis. H., Horst, J.W. and Wit, H.P.) Academic Press, London, pp. 124–134.Google Scholar
- Kemp, D. T. and Brown. A.M. (1984) Ear canal acoustic and round window correlates of 2f\-f2 distortion generated in the cochlea. Hear. Res. 13. 39–46.Google Scholar
- Kim, D.,. (1980) Cochlear mechanics: Implications of electrophysiological and acoustical observations. Hear. Res. 2, 297-317.Google Scholar
- Lonsbury-Martin, B.L.. Probst. R.. Coats. A.C. and Martin. G.K. (1987) Acoustic distortion products in rabbits. I. Basic features and physiological vulnerability. Hear. Res. 28, 173–189.Google Scholar
- Schmiedt, R.A. (1986) Effects of asphyxia on levels of ear canal emissions in gerbil. Assoc. Res. Otolaryngol. Abst. 9. 140. 112 - 113.Google Scholar
- Schmiedt, R.A. and Adams. J.C. (1981) Stimulated acoustic emissions in the ear canal of the gerbil. Hear. Res. 5. 295–305.Google Scholar
- Whitehead, M.L.. Lonsbury-Martin. B.L. and Martin. G.K. (1990) The effects of the crossed acoustic reflex on distortion-product otoacoustic emissions in rabbits. ln Submission, Hear. Res.Google Scholar
- Wiederhold, M.L., Mahoney. J.W. and Kellogg. D.L. (1986) Acoustic overstimulation reduces 2f-f2 cochlear emissions at all levels in the cat In: Peripheral Auditory Mechanisms (Eds: Allen. 1.B., Hall. J.L.. Hubbard, A.E., Neely, S.T. and Tubis. A.) Springer-Verlag. New York. pp. 322 - 329.Google Scholar