Sound and Vibration Sources and Accessories

The new device, Acoustic Duct, from Scien Ltd., is a complete system to measure sound absorption coefficient using ASTM E-1050 and sound transmission loss using a soon to be drafted-ASTM test method. In absorption the sample is mounted at the end of a tube. In transmission it is mounted in the middle. The test, for one sample takes perhaps 25-minutes to set up and each sample can be tested with full graphics, in about five minutes. The main feature of this system is the ease of set-up and operation. It uses precision components and easily fits on a desktop.