Research

 

The research in AVAH Lab is focused on studying the underlying mechanisms of voice production. The function and characteristics of the vocal folds are studied in norm and disorder in order to determine how an anomaly in the structure or mechanisms can lead to dysphonia. To do so, high-speed videoendoscopy (HSV), a laryngeal imaging technique, acoustic recordings, and perceptual voice quality measurements are obtained from the subjects. The goal is to determine the relationships between the vocal mechanisms, the generated speech sounds, and the perceived voice quality to improve voice assessment and treatment procedures. The HSV system provides big sets of data with high temporal resolution. Big data analysis, statistical techniques, and image/signal processing are used to analyze such data. Moreover, biomechanical modeling is done to study the biomechanics of vocal folds vibration.

HSV_frame

 

In addition to studying the voice production and speech acoustics, we are interested in the sound processing by the auditory system. This is important since the main way to detect voice disorders is to listen to someone's voice and therefore, how the auditory system interprets the sound plays a crucial role in our judgement. We are currently looking at the sound analysis inside the inner ear, where the acoustical signals are converted to biomechanical and then electrical signals and are sent toward the brain for further processing. We use otoacoustic emissions to study the inner ear function.

Fine_Structure           Ear