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BERNARD A. LANDES, Ph.D.

AMA Arch Otolaryngol. 1958;68(6):685-696.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Introduction

Because loudness recruitment has assumed significant clinical and diagnostic importance, many tests have been devised to demonstrate its presence. One such test involves automatic audiometry. In 1947, when Békésy¹ first described his automatic audiometer, he also suggested that the amplitude of excursions of the audiometric tracing gives a measure of the difference limen (DL) for intensity. It was further reasoned that if recruitment were the result of an abnormally rapid growth of loudness, this rapid growth should be the result of diminished DL's. Therefore, diminished excursions in automatic audiometry have been taken as direct indications of the presence of recruitment.

The identity of diminished excursions on the automatic audiogram with DL's and recruitment has been supported by such authors as Reger,⁹ Lundborg,⁴ and Meurman.⁵ On the other hand, Palva,⁶ one of the more prolific critics of the measurement of recruitment by automatic audiometry, has . . . [Full Text PDF of this Article]

Author Affiliations
Lubbock, Texas

Assistant Professor of Speech and Director of the Speech and Hearing Clinic, Texas Technological College.

Footnotes
Submitted for publication March 4, 1958.

This article is based on a doctoral dissertation done under the direction of Drs. Merle Lawrence and George Herman.

The research was supported in part by the Research and Development Division, Office of the Surgeon General, Department of the Army, under Contract No. DA-49-007-MD-634 and by Funds for Research in Human Resources, University of Michigan.

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