REPORT pinto:rr07-11/IDIAP Exploiting Phoneme Similarities in Hybrid HMM-ANN Keyword Spotting Pinto, Joel Praveen Lovitt, Andrew Hermansky, Hynek EXTERNAL PUBLIC Idiap-RR-11-2007 2007 IDIAP Submitted for publication We propose a technique for generating alternative models for keywords in a hybrid hidden Markov model - artificial neural network (HMM-ANN) keyword spotting paradigm. Given a base pronunciation for a keyword from the lookup dictionary, our algorithm generates a new model for a keyword which takes into account the systematic errors made by the neural network and avoiding those models that can be confused with other words in the language. The new keyword model improves the keyword detection rate while minimally increasing the number of false alarms.