Demonstration of a portable system for auditory brainstem recordings based on pure tone masking difference

Forfattere

  • Christian Brandt Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
  • Ture Andersen Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark; Odense University Hospital, Department of Audiology, Sdr. boulevard 29, DK-5000 Odense C, Denmark
  • Jakob Christensen-Dalsgaard Institute of Biology, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark

Resumé

The auditory brainstem response (ABR) has for many years been an important research tool. It has been used in many different settings from threshold determination on subjects unable to participate in ordinary psychoacoustic testing, to diagnosing tumours on the auditory nerve. The problem with most ABR systems is that they are either big, inflexible or both. Furthermore, most systems are not portable. We have developed an ABR system based on a Tucker-Davis Technologies differential amplifier and portable digital signal processor (RM2). The differential amplifier is connected via an optical cable. This system is small, weighing less than 750 grams including batteries. It is also very flexible with a graphical pro- gramming interface that makes it possible with relative ease to modify the entire system and it is relatively inexpensive (approximately 2000 USD). We have implemented a pure tone masking difference ABR method (Ber- lin1991) The system has been developed for human ABR measurements and will be demonstrated at the symposium. To explore the possibilities of the system we have also used it to determine the audiograms for frogs (Rana temporaria, Xenopus tropicalis) and lizards (Gekko gecko). The audiogram is difficult to measure by behavioral methods since lizards and frogs cannot be conditioned to acoustical stimuli. ABR measurements are therefore the most convenient way to compare thresholds in the different species.

Referencer

Berlin, C. I., Hood, L. J., and Barlow, EK. (1991). “Derived guinea pig compound viiith nerve action potentials to continuous pure tones,” Hear Res 52, 271-280.

Katbamna, B., Brown, J. A., Collard, M., and Ide, C. F. (2005). “Auditory brainstem responses to airborne sounds in the aquatic frog Xenopus laevis: correlation with middle ear characteristics,” J. Comp. Physiol. A. 192, 381-387.

Yderligere filer

Publiceret

2007-12-15

Citation/Eksport

Brandt, C., Andersen, T., & Christensen-Dalsgaard, J. (2007). Demonstration of a portable system for auditory brainstem recordings based on pure tone masking difference. Proceedings of the International Symposium on Auditory and Audiological Research, 1, 241–248. Hentet fra https://proceedings.isaar.eu/index.php/isaarproc/article/view/2007-23

Nummer

Årg. 1 (2007): Auditory Signal Processing in Hearing Impaired Listeners

Sektion

2007/2. Physiological correlates of auditory functions

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