[1] Villchur E.M. Problems of bass reproduction in loudspeakers.
J Audio Eng Soc
. 1957;5(3):122–126.
[2]
For supplemental reading, the student will find the following publication valuable. In: Borwick J, ed.
Loudspeaker and headphone handbook
. 3rd ed. Oxford: Focal Press; 2001.
[3] Rice C.W, Kellogg E.W. Notes on the development of a new type of hornless loudspeaker.
J Audio Eng Soc
. 1982;30(7/8):512–521 Abridgment of paper presented at the Spring convention of the A.I.E.E., St. Louis, April 13–17, 1925. U.S. Patent No. 1,795,214. Previous patents for moving-coil transducers were granted to Ernest Siemens in 1874 (US patent no. 149797) and Sir Oliver Lodge in 1898 (British patent no. 9712)..
[4] Klippel W.
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