Visual Feedback of Acoustic Voice Features in Voice Training

Speech technology has long been utilised to within computer-assisted tools for voice training. Such tools, providing real-time visual feedback of specific characteristics of the voice, complement traditional training methods. However, in order for such technology to be successful, specific aspects of voice training must be considered including the nature of voice perception, motor learning processes, and what information can be reliably extracted from the voice signal. This paper examines the factors that must be considered in developing voice training technology, and provides an overview of the techniques that have been applied to extract information from the voice signal and present it visually for real-time training purposes.