ABSTRACT
Steven Dixon Department of Physics, University of Warwick 7.1 Ultrasonics 7/2
Vivian Weeks Formerly of BBC Design and Equipment Department 7.2 International standards for sound systems and equipment 7/19
John Ratcliff Proprietor, The Television Training Company 7.3 Digital time signals 7/33 7.4 Health and Safety 7/38 7.5 Portable appliance testing 7/54
