Vocally and Aldebaran have worked on the integration of Vocally software elements, which aims to improve the robot Nao’s audition by noise reduction and voice print recognition, into the current hardware architecture Nao. Efforts have been mainly dedicated to the assessment of the noise reduction engine developed by Vocally. To measure the effects that Vocally noise reduction has on speech recognition engines currently embedded into the robot, it seems already very useful to remove ambient background noise, starting with the more dominant noise source into NAO's head : its fan.