Conical horns possess two aspects of considerable importance. In the first place, they are an exceedingly important form of acoustical apparatus. Again, there is no exact theory of the action of conical horns and hence the only recourse for quantitative information is that of experiment.
Proceedings of the Iowa Academy of Science
©1919 Iowa Academy of Science, Inc.
Stewart, G. W.
"The Action of Conical Horns,"
Proceedings of the Iowa Academy of Science, 26(1), 521-522.
Available at: https://scholarworks.uni.edu/pias/vol26/iss1/53