Contralateral Acoustic Reflex Thresholds for Tonal Activators Using Wideband Energy Reflectance and Admittance The purpose of this study was to evaluate a new method for estimating the acoustic reflex threshold incorporating wideband (250–8000 Hz) measures of energy reflectance and admittance (M. P. Feeney & D. H. Keefe, 2001). The wideband technique incorporates both a correlation method to assess the pattern of the reflex-induced ... Research Article
Research Article  |   February 01, 2003
Contralateral Acoustic Reflex Thresholds for Tonal Activators Using Wideband Energy Reflectance and Admittance
 
Author Affiliations & Notes
  • M. Patrick Feeney, PhD
    The Ohio State University, Columbus, OH
  • Douglas H. Keefe
    Boys Town National, Research Hospital, Omaha, NE
  • Lindsay P. Marryott
    The Ohio State University, Columbus, OH
  • Contact author: M. Patrick Feeney, PhD, Department of Otolaryngology, Head and Neck Surgery, Box 357923, University of Washington, Seattle, WA 98195-7923.
    Contact author: M. Patrick Feeney, PhD, Department of Otolaryngology, Head and Neck Surgery, Box 357923, University of Washington, Seattle, WA 98195-7923.×
  • Corresponding author: E-mail: pfeeney@u.washington.edu
Article Information
Hearing Disorders / Hearing / Research Articles
Research Article   |   February 01, 2003
Contralateral Acoustic Reflex Thresholds for Tonal Activators Using Wideband Energy Reflectance and Admittance
Journal of Speech, Language, and Hearing Research, February 2003, Vol. 46, 128-136. doi:10.1044/1092-4388(2003/010)
History: Received November 13, 2001 , Accepted May 28, 2002
 
Journal of Speech, Language, and Hearing Research, February 2003, Vol. 46, 128-136. doi:10.1044/1092-4388(2003/010)
History: Received November 13, 2001; Accepted May 28, 2002
Web of Science® Times Cited: 30

The purpose of this study was to evaluate a new method for estimating the acoustic reflex threshold incorporating wideband (250–8000 Hz) measures of energy reflectance and admittance (M. P. Feeney & D. H. Keefe, 2001). The wideband technique incorporates both a correlation method to assess the pattern of the reflex-induced shifts in reflectance and admittance across frequency and a magnitude method to determine if the amplitude of the shifts exceeds baseline variability. Contralateral reflex thresholds for 1000- and 2000-Hz activators were obtained for 34 young adults with both the wideband method and a clinical method using a 226 Hz probe tone. Average reflex thresholds obtained with the new method were 12 to 13.7 dB lower than those obtained with the clinical method. When the bandwidth of analysis of admittance and reflectance responses was limited to 250 to 2000 Hz, the reduction in reflex thresholds was accompanied by the rejection of 96% of nonactivator-baseline responses as reflexes. The method holds promise for extending reflex threshold testing to patients with reflexes elevated beyond current equipment limits, for reducing the sound levels used in reflex testing, and for obtaining sensitive measures of reflex threshold in infants.

Acknowledgments
The authors would like to thank Susan Voss for helpful comments on an earlier version of this article. This research was supported by a New Investigator Award from the American Speech-Language-Hearing Foundation and by National Institutes of Health Grants R03 DC04129 and R01 DC03784.
Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access