THE POWER OF FUNDAMENTAL SPEECH SOUNDS 395 



TABLE I 



Normal Values of Peak Power in Microwatts for Two Speakers 

 (A) Consonants 



Low frequency puff. 



(B) Semi-Vowels 



Note: For these two speakers, the peak power of the succeeding vowel was as 

 follows: 



Total Per Cm^ 



u (tool) 206 1.7 



a (tap) 860 6.8 



e (teem) 241 1.9 



about 127, the intensities 0.15, 0.11 and 0.13 are the first three num- 

 bers respectively divided by 127. 



These values were derived by measuring the amplitudes of the above- 

 mentioned oscillograms of the acoustic pressure. The maximum or 

 peak amplitudes of the consonant and the succeeding vowel were first 

 measured; the square of the ratio bstween these is the ratio of the 



