Bone-Vibrator Measurements: Physical Characteristics and Behavioral Thresholds Both the International Electrotechnical Commission and the American National Standards Institute have issued documents recommending mechanical impedance characteristics for an artificial mastoid. These specifications were intended for use with bone-conduction vibrators that have a circular contact tip area of 1.75 cm2 and are coupled to the skull with a static ... Research Article
Research Article  |   June 01, 1975
Bone-Vibrator Measurements: Physical Characteristics and Behavioral Thresholds
 
Author Affiliations & Notes
  • Donald D. Dirks
    UCLA School of Medicine, Los Angeles, California
  • Candace Kamm
    UCLA School of Medicine, Los Angeles, California
Article Information
Research Articles
Research Article   |   June 01, 1975
Bone-Vibrator Measurements: Physical Characteristics and Behavioral Thresholds
Journal of Speech, Language, and Hearing Research, June 1975, Vol. 18, 242-260. doi:10.1044/jshr.1802.242
History: Received December 12, 1974 , Accepted January 20, 1975
 
Journal of Speech, Language, and Hearing Research, June 1975, Vol. 18, 242-260. doi:10.1044/jshr.1802.242
History: Received December 12, 1974; Accepted January 20, 1975

Both the International Electrotechnical Commission and the American National Standards Institute have issued documents recommending mechanical impedance characteristics for an artificial mastoid. These specifications were intended for use with bone-conduction vibrators that have a circular contact tip area of 1.75 cm2 and are coupled to the skull with a static force of 5.4 Newtons. Two new vibrators and headband arrangements that conform to these requirements have become available for clinical testing. The investigations herein describe the comparative physical characteristics of these new vibrators on two artificial mastoids and report the results of behavioral studies in which bone-conduction thresholds were obtained and referenced to physical calibration measurements made on the artificial mastoids.

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