178 BELL SYSTEM TECHNICAL JOURNAL 



Therefore unless there is a linear relation between a force acting on 

 the ear-drum and the displacement at the oval window, that is unless 

 all the coefficients in equation (2) are zero except o-i, all the harmonics 

 and the summation and difference tones will be impressed upon the 

 fluid in the cochlea of the inner ear. 



BIBLIOGRAPHY 



Pitch Discrimination 

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Intensity Discrimination 



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Absolute Sensitivity 

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Upper Limit of Audibility 



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34 Koenig, Handb. d. Physiol., 3, p. 112, 1880; Ann. d. Phys., 69, pp. 626-721, 1899. 



