Length of Phonemes in a Context of their Positions in Polish Sentences Topics: Biometrics and Pattern Recognition; Design and Implementation of Signal Processing Systems; Multidimensional Signal Processing; Multimodal Signal Processing In Proceedings of the 10th International Conference on Signal Processing and Multimedia Applications and 10th International Conference on Wireless Information Networks and Systems - Volume 0ICETE, 59-64, 2013 , Reykjavík, Iceland