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February 1971


Author Affiliations

College of Physicians and Surgeons of Columbia University Department of Otolaryngology 630 W 168th St New York 10032

Arch Otolaryngol. 1971;93(2):220. doi:10.1001/archotol.1971.00770060306024

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To the Editor.—I was asked to comment on the paper by Horst Ganz, MD, entitled "Experiments on Acoustic-Stimulated Eye Movement."

Approximately a year ago, I had a chance to talk to Dr. Ganz about his experiments and their interpretation. Much of what appears below is a repetition of these earlier comments.

As mentioned in his paper, I once (1948) performed some experiments that were similar to those of Ganz, but only to a degree. Ganz used an open-sound system, and one can reasonably assume that the intensity modulation produced by a rotating sound source with respect to one ear was not larger than approximately 6 dB, if it was that large at all. (The exact value may have varied somewhat with frequency, higher frequency being better off in this respect.) Thus, the interaural intensity difference was very small, ie, probably less than 6 dB. That is too little for

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