Effect of impulse noise on the auditory brainstem response of the fetal sheep and the adult ewe: case study.
Publication/Presentation Date
11-1-1994
Abstract
Auditory brainstem responses (ABR) were obtained from a sheep fetus in utero and from a nonpregnant ewe before and after a noise exposure generated by 10 105-mm howitzer impulses (160-166 dB peak pressure). Fetal ABR thresholds shifted by less than 15 dB, whereas the adult thresholds shifted more than 50 dB. Comparison of exposed and nonexposed fetal cytocochleograms revealed minimal sensory cell loss in two age-matched animals. Although fetal ABR threshold shifts were noted in this study, the magnitude of shift was modest when compared to the significant elevation of the adult ABR thresholds.
Volume
159
Issue
11
First Page
676
Last Page
680
ISSN
0026-4075
Published In/Presented At
Pierson, L. L., Gerhardt, K. J., Abrams, R. M., Griffiths, S. K., & Peters, A. J. (1994). Effect of impulse noise on the auditory brainstem response of the fetal sheep and the adult ewe: case study. Military medicine, 159(11), 676–680.
Disciplines
Medicine and Health Sciences
PubMedID
7885594
Department(s)
Department of Obstetrics and Gynecology
Document Type
Article