AES New York 2011
Saturday, October 22, 4:30 pm — 6:30 pm (Room: 1E09)
T13 - Telephonometry: The Practical Acoustics of Handsets, Headsets, and Mobile Devices
Christopher J. Struck, CJS Labs - San Francisco, CA, USA
This tutorial introduces the basic concepts of Telephonometry with respect to electroacoustic measurements on analog and digital telephones. Both subjective and objective methods are discussed and the historical concept of Loudness Rating and standardized methods for its calculation are reviewed. Standard objective measurements of send, receive, sidetone and echo response are explained. The selection and use of appropriate instrumentation, including ear and mouth simulators, is also described. Techniques for the evaluation of handsets, headsets, speakerphones, and other hands-free devices are presented. Applications of these measurements to analog, digital, cellular, and VOIP devices are shown. Various methods specified in the ITU-T, IEEE, TIA, ETSI, and 3GPP standards are explained.
Information Last Updated: 20111005, mei