504 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1924 



satisfactory spoken communication. As has been pointed out above, 

 although the fundamental cord tones and harmonics lying below 500 

 cycles carry most of the speech energy, they contribute little to the 

 articulation. It has been observ^ed that naturalness of reproduc- 

 tion is greatly affected depending upon whether or not these low 



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frequency tones are preserved. While it might be concluded from 

 the articulation data then, that frequencies in the lower part of the 

 speech range are unimportant, a fuller consideration justly at- 

 tributes an added measure of importance on account of naturalness. 

 The naturalness of speech quality is a characteristic calling for 

 considerable further investigation. 



