An Inexpensive Type of Sound-Proof Room Suitable for Zoological Research

Abstract

The design of an inexpensive sound-proof room, virtually sound-proof to audiofrequencies of 2 kc. and above, is described. Since for the purposes of many zoological experiments low frequencies can safely be disregarded, it is felt that on account of cheapness and relative ease of construction, this type of sound-proof room has much to recommend it.