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Peter Popolo

Assistant Professor (10M), Communication Sciences and Disorders

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Peter S. Popolo received his PhD in Speech and Hearing Science from The University of Iowa; he also holds Bachelors' and Masters' degrees in Electrical Engineering from Rutgers University. With this background, he was able to customize his doctoral degree to combine digital speech and image processing technology with clinical applications in speech and voice, and he now contributes his talents as a Voice Scientist and Vocologist in the fields of acoustic analysis of voice and high-speed imaging of the vocal folds. Dr. Popolo has worked in industry developing diagnostic tools used by ear, nose, and throat (ENT) doctors and speech-language pathologists; and in academic settings, most recently at the National Center for Voice and Speech, where he helped develop tools for measuring vocal dose and performing ambulatory monitoring of voice to study vocal fatigue and recovery. Current research interests include the development of wearable biosensors to be used with smart phones to collect voice data from disordered voice patients over a cloud-based network, for the purpose of creating a database that can be used by researchers and clinicians to study the efficacy of vocal therapies and track improvements in their patients; and the development of new tools and techniques for high-speed video imaging of the larynx. Peter is a classically trained tenor, and has sung with Opera Colorado chorus, Colorado Symphony Chorus, The Cathedral Basilica of the Immaculate Conception of the Archdiocese of Denver, and most recently with Opera Theatre of Montclair.

Dr. Popolo runs the newly created Acoustics, Biosensors, and Imaging Laboratory (ABILAB) at MSU, and new research projects are currently underway. These include new algorithms for calculating smoothed Cepstral Peak Prominence (CPPs), an acoustic parameter for assessing hoarseness and breathiness in voice; and new high-speed video imaging software for relating extracted glottal area waveforms and vocal fold displacements to calculated CPPs and CAPE-V/GRBAS ratings obtained by perceptual analysis. Future work is in planning to create a female singing voice synthesizer, as part of Project ABI (see Research Project below).

Peer-Reviewed Journal Articles

Popolo P.S. (2017). Investigation of Flexible High-Speed Video Nasolaryngoscopy. Journal of Voice, In Press.

Popolo P.S., Titze I.R., Hunter E.J. (2011). Towards a self-rating tool of the inability to produce soft voice based on nonlinear events: A preliminary study. Acta Acustica United With Acustica, 97:373-381.

Popolo, P.S. & Titze, I.R. (2008). Qualification of a quantitative laryngeal imaging system using videostroboscopy and videokymography. Annals of Otology, Rhinology and Laryngology, 117:404-12.

Popolo, P.S., Svec, J.G. & Titze, I.R. (2005). Adaptation of a Pocket PC for use as a wearable voice dosimeter. Journal of Speech, Language and Hearing Research, 48:780-91.\s

Svec, J.G., Popolo, P.S. & Titze, I.R. (2003). Measurement of vocal doses in speech: experimental procedure and signal processing. Logoped Phoniatr Vocol, 28:181-92.

Titze, I.R., Riede, T. & Popolo, P.S. (2008). Nonlinear source-filter coupling in phonation: II. Vocal exercises. Journal of the Acoustical Society of America, 123: 1902–1915.

Svec, J.G., Titze, I.R. & Popolo, P.S. (2005). Estimation of sound pressure levels of voiced speech from skin vibration of the neck. Journal of the Acoustical Society of America, 117:1386-94.

Emerich, K.A., Titze, I.R., Svec, J.G., Popolo, P.S. & Logan, G. (2005). Vocal range and intensity in actors: a studio versus stage comparison. Journal of Voice,19:78-83.

Titze, I.R., Svec, J.G. & Popolo, P.S. (2003). Vocal dose measures: quantifying accumulated vibration exposure in vocal fold tissues. Journal of Speech, Language and Hearing Research, 2003, 46:919-32.


Popolo, P. S., Sanders, R. W., & Titze, I. R. (2007). Quantifying the speaking voice: Generating a speaker code as a means of speaker identification using a simple code-matching technique. 123rd Audio Engineering Society Convention, 1:456-468.

Popolo, P.S., Titze, I.R. (2007). Relating vocal fold amplitude of vibration to skin acceleration level on the anterior neck. MAVEBA (Models and Analysis of Vocal Emissions for Biomedical Applications), Firenze, Italy December 13 -15, 2007.

Popolo, P.S., Rogge-Miller, K., Svec, J.G. & Titze, I.R. (2002). Technical considerations in the design of a wearable voice dosimeter. Proceedings 7th ICSLP, Denver, CO, 2002

Sanders, R.W., Popolo, P.S. (2008). Extraction of electric network frequency signals from recordings made in a controlled magnetic field. 125th Audio Engineering Society Convention, 2008, 2:1143-1150.

Svec, J.G., Titze, I.R., Popolo, P.S. (2003). Vocal Dosimetry: Theoretical and Practical Issues. AQL 2003 Hamburg: Proceeding Papers for the Conference in Quantitative Laryngology, Voice and Speech Research


Popolo, P.S. & Turner, C.W. (2005). Recognition of vowels that have been spectrally warped according to the frequency map for the spiral ganglion. 149th Meeting of the Acoustical Society of America, Vancouver, Canada, May 16-20, 2005.

Popolo, P.S., Rogge-Miller, K., Svec, J.G. & Titze, I.R. (2002). Technical considerations in the design of a wearable voice dosimeter. 144th Meeting of the Acoustical Society of America, Cancun, Mexico, December 2-6, 2002.

Courses Taught:

CSND 534 Speech and Hearing Science
CSND 409 Anatomy and Physiology of Speech and Hearing Systems
CSND 595 Applying Research I

Office Hours


1:00 pm - 2:00 pm
3:00 pm - 4:00 pm
10:00 am - 11:00 am
3:00 pm - 4:00 pm


Research Projects

Project ABI

Project ABI seeks to utilize a combination formant synthesizer / vocal-fold 3-Mass Model / sub-glottal waveform model to create a female singing voice automaton with articulatory features, named "ABI." The project will enlist student volunteers with skills and backgrounds in phonetics, linguistics, voice, motor-speech, computer programming, and singing. For more information about this project, please contact Peter S. Popolo by email at