Portable and Semiportable Loudspeaker Systems for Reproducing 16-mm Sound on Film

This paper describes three types of loudspeaker systems which have been designed for 16-mm sound on film reproduction. One system uses a dia-cone speaker mounted in a portable leatherette carrying case. A 12-inch speaker is used and the acoustic radiation is obtained from two diaphragms attached to a single voice coil. The outer diaphragm is of the molded-cone type and the inner is a domed dural type of diaphragm which is attached at its edges to the 3-inch voice coil. A second system is mounted in a portable cabinet which has 3.2 cubic feet and is resonated for maximum response down to 85 cycles. The speaker is of the 15-inch type and of similar construction to the 12-inch with the addition of a 6-cell multicellular horn mounted directly in front of the 3-inch dural diaphragm. The third system consists of a duplex speaker and is intended for permanent and semipermanent installations.

Print ISSN

0097-5834

Published

1947-11

Content type

Original Research

DOI

10.5594/J12675