@conference{rix1999perceptual, title = {Perceptual Measurement of End-to-End Speech Quality Over Audio and Packet-Based Networks}, author = {Rix, Antony and Reynolds, Richard and Hollier, Mike}, booktitle = {Audio Engineering Society Convention 106}, month = {May}, year = {1999}, url = {https://www.aes.org/e-lib/browse.cfm?elib=8307} }