@article{roering1983the, title = {The Twin-Tone Distortion Meter: A New Approach}, author = {Roering, Han}, journal = {J. Audio Eng. Soc}, volume = {31}, number = {5}, pages = {332--340}, year = {1983}, url = {https://www.aes.org/e-lib/browse.cfm?elib=4575} }