1. Statistical-model-based speech enhancement systems;Ephraim;Proc. IEEE,1992
2. ITU-T Recommendation P.58, 1996. Head and torso simulator for telephonometry. International Telecommunication Unit, Telecommunication Standardization Sector, Series P: Telephone Transmission Quality, Objective Measuring Apparatus, Helsinki
3. Olson, H.F., 1979. Directional microphones. An anthology of articles on microphones from the pages of the J. Audio. Eng. Soc. 1–27 (1953–1979), pp. 190–194
4. Second-order gradient unidirectional microphone utilizing an electret transducer;Sessler;J. Acoust. Soc. Am.,1975
5. Zollner, M., Zwicker, E., 1993, Elektroakustik, Springer, Berlin, pp. 189–196