Speech enhancement for linear-predictive-analysis-by-synthesis coders. - Marcin Kuropatwinski; Dieter Leckschat; Kristian Kroschel; Andrzej Czyzewski; Chaz Hales (EUROSPEECH, 1999)

Optimized second-order gradient microphone for hands-free speech recordings in cars. - Roland Aubauer; Dieter Leckschat (Speech Commun., 2001)