Abstract

Get full access to this article
View all access options for this article.
References
1.
M.R.C.
(1947 ). Special Report Series No. 261 . H.M.S.O.
2.
Morland, S.
(1671 ). Tuba Stentoro-Phonica. An instrument of excellent use .
3.
Athanasius Kircher, S.J.
(1673 ). Phonurgia Nova .
4.
Littler, T.S.
Journal of Scientific Instruments , XIII , May, 1936 .
5.
Littler, T.S.
Journal of the Institution of Electrical Engineers , 91 , Part III, No. 14 . June, 1944 .
6.Physical Review , 74 , July 15th, 1948 , pp. 230 -233 .
7.
Fowler, E.P.
(1936 ). Arch. Otolaryng. , Chicago . 24 , 731 .
8.
Steinberg, J.C.
and
Gardner, M.B.
(1937 ). J. acoust. Soc. America . 9 , 11 .
9.
Pierre De Latil .
New Scientist.
4 , 87 .
