Linguistic and Acoustic Changes of U Different Dialogue S

This paper presents the characteristic differences of acoustic and linguistic features observed in different spoken dialogue situations: human-human vs. human-machine interactions. We compare the acoustic and linguistic features of the user’s speech to a spoken dialogue system and to a human-operator in several landmark setting tasks for a car navigation system. It has been pointed out that speech-based interaction has the potential to distract the driver’s attention and degrade safety. On the other hand, it is not clear whether different dialogue situations cause any acoustic or linguistic differences on one’s utterances in a speech interface system. We collected a set of spoken dialogues by 10 subject speakers under several dialogue situations. For a car driving condition, we prepared a virtual driving simulation system. We analyzed the characteristic differences of user utterances caused by different dialogue situations or the system’s responses to the users. As a result, some prosodic and linguistic features were affected by whether the dialogue partner is a human or a machine, while some prosodic features alone were affected by a car-driving task.