Abstract
The use of affective speech in robotic applications has increased in recent years, especially regarding the developments or studies of emotional prosody for a specific group of people. The current work proposes a prosody-based communication system that considers the limited parameters found in speech recognition for the elderly, for example. This work explored what types of voices were more effective for understanding presented information, and if the affects of robot voices reflected on the emotional states of listeners. By using functions of a small humanoid robot, two different experiments conducted to find out comprehension level and the affective reflection respectively. University students participated in both tests. The results showed that affective voices helped the users understand the information, as well as that they felt corresponding negative emotions in conversations with negative voices.
Highlights
IntroductionRecent studies have shown that people prefer to communicate with robots using voice [15]
This work tested the effect of robotic speech prosody during human robot interaction
The work in this paper indicated the experimental results from university students, if considering the specific situations, such as elderly care by social robots, the natural and more adequate interaction is required for successful human robot interaction
Summary
Recent studies have shown that people prefer to communicate with robots using voice [15]. Synthetic speech has been developed for natural communication between humans and robots [16], and, by applying emotion to synthetic speech, the conversation can be made much more natural [17]. Voice signals can transmit emotional information by vocal prosody, which is an important aspect regarding the communication between humans and intelligent systems [18]. Prosody is the part of linguistics that studies the intonation, rhythm, and accent (intensity, height, duration) of spoken language and other related attributes in speech. Natural language recognition has been handled as an important issue to control the humanoid robots in human robot interaction areas [19]
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