DYNAMICAL STUDY OF THE J'OJVEL SOUNDS 



105 



Spectra of the Vowel Sounds 



We shall take as fundamental data the average spectra of the vowel 

 sounds (for male voices) as given by the writer's previous work with 

 C. F. Sacia, and as given in Sir Richard Paget's chart. We thus treat 

 Sir Richard's data as if they had been obtained analytically, and not 

 synthetically, for the sake of taking the mean values of the two most 

 complete series of data available, to get a better basis for calculation. 



The two principal resonant frequencies for each sound are given in 

 Table I. The lower characteristic frequency is denoted by coi/27r ; the 

 other by co2/2t. These characteristic frequencies are also shown in the 

 chart of Fig. 4. 



OC 



u 



IE 



Z% 5(cZ 512 7Z4 10?4 1446 Z048 269G 409G 

 FREQUENCY 

 Fig. 4 — Principal resonant frequencies, vowel sounds 



