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Periklis Y. Ktonas, PhD; Franklin O. Black, MD; Jack R. Smith, PhD

Arch Otolaryngol. 1975;101(7):413-417.

Abstract
With the advent of digital computer measurement techniques for nystagmus parameter determinations, the need has arisen for careful quality control of nystagmus recording methods. For this study, electronic filter distortion of nystagmus waveforms was quantified, and the results were used to formulate guidelines for selection of appropriate bandwidths depending on the user's requirements.

For minimum distortion, a lower time constant of at least three seconds and an upper frequency cutoff of at least 60 hertz are recommended.

Author Affiliations
From the Department of Electrical Engineering (Drs. Ktonas and Smith); the Division of Otolaryngology (Dr. Black), the University of Florida, Gainesville. Dr. Ktonas is currently with the Department of Electrical Engineering, the University of Houston, and Dr. Black is with the Department of Otolaryngology, Eye and Ear Hospital, Pittsburgh.

Footnotes
Accepted for publication Feb 12, 1975.

Reprint requests to the Department of Otolaryngology, Eye and Ear Hospital, 230 Lothrop St, Pittsburgh, PA 15213 (Dr. Black).

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