. Carnegie Institution of Washington publication. 18 THE STUDY OF SPEECH CURVES. stresses and strains favor the components of greater frequency. The problem of how this occurs still remains uninvestigated. The experi- ments of Bourget were confined to paper membranes glued to wooden frames; the analytical treatment by Rayleigh is confined to firm edge- fixation; the results are not applicable to the present case. It is natural to suppose that the change of the simple fork tone into a sharp tone occurs by vibration of the diaphragm in parts; as far as I am aware this is the thought in the minds
. Carnegie Institution of Washington publication. 18 THE STUDY OF SPEECH CURVES. stresses and strains favor the components of greater frequency. The problem of how this occurs still remains uninvestigated. The experi- ments of Bourget were confined to paper membranes glued to wooden frames; the analytical treatment by Rayleigh is confined to firm edge- fixation; the results are not applicable to the present case. It is natural to suppose that the change of the simple fork tone into a sharp tone occurs by vibration of the diaphragm in parts; as far as I am aware this is the thought in the minds of all who have discussed vibrating membranes. In the case of sound boxes from talking machines this view is erroneous, as the following experiments show. To test the effect of the entire removal of the edge-fixation a repro- ducer was employed in which the diaphragm was not fastened at the edge at all, being supported only by the arm at the center. When set in vibra-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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