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Voice & Speech Science Lab​

Directed by Molly Erickson, Ph.D.

The Voice and Speech Science Research Laboratory located in South Stadium Hall and is designed to conduct research both at the Master's and Ph.D. levels in the areas of voice and speech science.  The lab is equipped with a large sound booth for recording speakers and professional singers. It also boasts equipment and software capable of performing a variety of research tasks: a Glottal Enterprises system for air flow analysis, subglottal air pressure measurement, and 2-channel electroglottograph and inverse filtering and a variety of programs used to produce real-time spectrograms and Fast Fourier analyses.  
The laboratory has available several methods of signal synthesis: signal generation hardware and software from Tucker-Davis Technologies, a Klatt synthesizer, and a singing voice synthesizer built using Aladdin. Perceptual experiments are designed and conducted using a variety of software and hardware combinations.  
The laboratory makes use of departmental equipment designed to visualize vocal fold vibration including: digital KayPentax stroboscopy, high speed video, and videokymography. This equipment is used to visualize the vocal folds for both voice physiology research and clinical diagnostics. 

  • Acoustic, physiology, and perception of singing 
  • Acoustics of cultural diversity
  • Normative data - vocal physiology 
  • Experimental phonetics - duration modeling 
  • Effects of music, spoken language, and sung language on semantic processing 
  • High speed video and videokymography 
  • Speaker identification in cochlear implant users
  • Music processing in cochlear implant users 

Currently, the laboratory is working on four large-scale projects. One project seeks to determine how listeners use vocal productions across vowels, pitches, and loudness levels to determine the identity or voice category of a specific speaker or singer. A second project seeks to determine the effects of instrumental music, sung music, and spoken language on semantic processing in normal and special population listeners. A third project seeks to determine how cochlear implant users identify individual speakers and how they derive enjoyment from music. The laboratory is also beginning vocal fold imaging research using high-speed video and videokymopraphy.  

Please email for participation opportunities.

Last Published: Jan 8, 2018