Assessment of voice quality: Current state-of-the-art.

Voice quality is not clearly defined but it can be concluded that it is a multidimensional perceived construct. Therefore, there are broadly two approaches to measure voice quality: (1) subjective measurements to score a client's voice that reflects his or her judgment of the voice and (2) objective measurements by applying specific algorithm to quantify certain aspects of a correlate of vocal production. This paper proposes a collection and discusses a number of critical issues of the current state-of-the-art in voice quality assessments of auditory-perceptual judgment, objective-acoustic analysis and aerodynamic measurements in clinical practice and research that maybe helpful for clinicians and researchers.