424 



KENNELLY, TAYLOR— PROPERTIES OF 



a later period, they were taken up for investigation, since marked 

 abnormalities of such a type adversely affect the circle-diagram 

 method of analyzing telephone receivers. For a long time, the 



An absorption region of . 



the diaphragm appears at 

 69/,$^. Being far removed . 

 from resonance, it is very 

 smalt 



A second absorption 

 region^ due to strain imposed 

 t>t/ a temporary irregulanfy 

 in damping^ appears at 

 789.5^. 



TeTLEPHONE: RECEIVETf? B. 



Load at Center, 0.73gm. 

 iMPEDANCE Circle 



ZO 30 ohms 



10 5 



iMirlMiil 



■-, ■ . -•^c -JO -io -lu " lu e.u ^c tu ov Of 



fresisrance 



Fig. 5. Distorted Motional-Impedance Circle. Small Distortion, Rising on 



the right. 



cause of these abnormalities baffled enquiry ; but finally their origin 

 was apparently brought to light, and it also became possible to pro- 

 duce them artificially, at will. 



