Bauhaus-Universität Weimar

The science of musical sounds
Miller, Dayton Clarence
The investigation of these peculiarities was most tantaliz¬ 
ing; the peaks acted like imps, jumping about from place 
to place with every attempt to catch them, and chasing 
and pushing one another in a very exasperating manner. 
Perhaps two months’ continuous search was required to 
find the causes of “1460” and “2190” alone. The investi¬ 
gations led to many improvements in the phonodeik and to 
F G A BC: 
I I I I ' 
Fig. 116. A response curve obtained with an early form of phonodeik. 
a practical method of correction for the departures from 
ideal response. 
Response of the Diaphragm 
Experiments have been made with diaphragms of several 
sizes and thicknesses, and of various materials, such as 
iron, copper, glass, mica, paper, and albumen. The experi¬ 
ments described in this section concern circular glass dia¬ 
phragms having a thickness of 0.08 millimeter, and held 
around the circumference, either firmly clamped between 
hard cardboard gaskets and steel rings, or loosely clamped 


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