COMPUTATION OF THE COMPOSITE NOISE 623 



2. "American Tentative Standards for Sound Level Meters for Measurement of 



Noise and Other Sounds" — Z24.3 — Approved American Standards Associa- 

 tion, Feb. 17, 1936. 

 "Indicating Meter for Measurement and Analysis of Noise" by T. G. Castner, 

 E. Dietze, G. T. Stanton and R. S. Tucker — District Meeting A. I. E. E., 

 April 1931, Rochester, N. Y. 



3. "Determination of Normal Curve from Tail" — Table XI of "Tables for Statis- 



ticians and Biometricians" by Karl Pearson — Part I — Second Edition, 1924. 

 "Graduation by a Truncated Normal" by Nathan Keyfitz — Annals of Mathe- 

 matical Statistics — Vol. 9, March 1938. 



4. "Collected Papers on Acoustics" by W. C. Sabine, 



"Reverberation Time in 'Dead' Rooms" by Carl F. Eyring — The Journal of the 



Acoustical Society of America, Vol. I, No. 2, January 1930, 

 "Architectural Acoustics" by V. O. Knudsen. 



5. Official Bulletin of the Acoustical Materials Association, No. 6, March 1938. 



