@article{webster1970updating, title = {Updating and Interpreting the Speech Interference Level (SIL)}, author = {Webster, John C.}, journal = {J. Audio Eng. Soc}, volume = {18}, number = {2}, pages = {114--118}, year = {1970}, url = {https://www.aes.org/e-lib/browse.cfm?elib=1519} }