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Otologic Hazards of Airbag Restraint System
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1974 by SAE International in United States
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Since the airbag passive restraint system may be in general use in early 1976, and in fact is now an option on some automobiles, its potential biomedical hazards need to be thoroughly examined. Previous investigations in this area have been extermely limited.
The objective of this study was to investigate the effects of local slap pressure of airbag deployment against the external ear and tympanic membrane and to measure its effects on subsequent hearing acuity. Adult and infant squirrel monkeys were used as experimental subjects, because the gross structure of their ear and tympanic membrane closely resembles man's. To create an adequate simulation of the airbag trauma, a small airbag was fabricated and mounted on a pneumatic impact facility. This device was designed to produce a specific velocity to determine the behavior of objects under impact conditions simulating accident kinematics. Cochlear nerve action potentials were measured in both ears of 10 subjects prior to blast, immediately postblast, and several weeks postblast. Highspeed photography recorded the events of the blast, as well as the technique of recording the potential from the cochlea and the appearance of the drumhead pre- and posttrauma. No permanent hearing damage, eardrum perforation, or disruption of ossicles occurred at airbag velocities up to 100 mph and a sound intensity level of 150 dB.
- Harry J. Richter - Dept. of Otorhinolaryngology, University of Michigan Kresge Hearing Research Institute
- R. L. Stalnaker - Dept. of Otorhinolaryngology, University of Michigan Kresge Hearing Research Institute
- James E. Pugh - Dept. of Otorhinolaryngology, University of Michigan Kresge Hearing Research Institute
CitationRichter, H., Stalnaker, R., and Pugh, J., "Otologic Hazards of Airbag Restraint System," SAE Technical Paper 741185, 1974, https://doi.org/10.4271/741185.
- Allen C. H. Bruce R. D. Dietrich C. W. Pearsons K. S. “Noise and Inflatable Restraint Systems.” Bolt, Beranek and Newman, Inc. Report 2020, Contract DOT-HS-006-1-006 September 1970
- Nixon C. W. “Human Auditory Response to an Air Bag Inflation Noise.” Biological Acoustics Branch 6570th Aerospace Medical Research Laboratories Wright-Patterson Air Force Base National Highway Safety Bureau March 1968
- Stebbins W. C. “Studies of Hearing and Hearing Loss in the Monkey.” Animal Psychophysics: The Design and Conduct of Sensory Experiments Stebbins W. C. New York Appleton-Century-Crofts 1970 41 66
- Pugh, J. E. Jr. Horwitz M. R. Anderson D. J. “Cochlear Electrical Activity in Noise Induced Hearing Loss.” Arch. Otolaryngology 100 1974 36 40
- Glass D. R. Hays P. O. Nicholls J. A. “A Study of the Noise Aspects of Automobile Air Bag Safety Systems.” Gas Dynamic Laboratories Report University of Michigan December 1970
- Hickling R. “An Investigation of the Noise and Overpressure Generated by the Safety Air Cushion,” GMC Research Laboratories 1974