{"id":152594,"date":"2026-04-28T09:30:10","date_gmt":"2026-04-28T13:30:10","guid":{"rendered":"https:\/\/www.ucf.edu\/news\/?p=152594"},"modified":"2026-04-24T15:36:19","modified_gmt":"2026-04-24T19:36:19","slug":"taking-apart-the-mystery-of-vocal-fatigue","status":"publish","type":"post","link":"https:\/\/www.ucf.edu\/news\/taking-apart-the-mystery-of-vocal-fatigue\/","title":{"rendered":"Taking Apart the Mystery of Vocal Fatigue"},"content":{"rendered":"
\n

To better understand Assistant Professor Hamzeh Ghasemzadeh and his work, he goes back to a childhood memory of broken toys. Within hours of receiving little robotic figures or remote-control cars, he\u2019d dissembled what had once been a carefully crafted package of technology. To him, sitting among the remnants of a new gift meant he was sitting in a circle of fun.<\/p>\n

\u201cMy favorite game was to take the toys apart to see how they work and then try to put them back together,\u201d Ghasemzadeh says. \u201cMy parents saw my curiosity as a great thing.\u201d<\/p>\n

“This is why I came to UCF. I\u2019ve been able to jump right in and address mysteries that haven\u2019t received much attention.”<\/p><\/blockquote>\n

That same curiosity now drives his research at UCF\u2019s School of Communication Sciences and Disorders<\/a>, where he seeks to take apart discomforted voices, figuratively, so he can develop strategies to make each one whole again. Ghasemzadeh, who joined UCF in late Summer 2025 and will teach in the school\u2019s newly launched communication sciences and disorders doctoral program<\/a>, has already secured one research project funded by the U.S. National Institutes of Health and is developing another.<\/p>\n

\u201cThis is why I came to UCF,\u201d he says. \u201cI\u2019ve been able to jump right in and address mysteries that haven\u2019t received much attention until now.\u201d<\/p>\n

A Common Problem Without Clear Answers<\/h2>\n

The first such mystery sounds quite straightforward: vocal fatigue, a common vocal complaint. Beneath the surface, however, it\u2019s deceptive. Solutions have mostly evaded scientists, leaving vocal fatigue as an ongoing problem for many people who rely on their voices, like coaches, public speakers, singers and teachers. Many of Ghasemzadeh\u2019s colleagues experience the very throat discomfort that he\u2019s deconstructing during the funded project just underway.<\/p>\n

“We want to collect … multi-modal data and use machine learning models to analyze [vocal fatigue] and develop recommendations for each person.”<\/p><\/blockquote>\n

\u201cSome instructors get vocal fatigue quickly, some get it slowly and some don\u2019t get it at all,\u201d he says. \u201cThere\u2019s a genetic component, but there are also behavioral components. How do they use their voice? How often do they use it? What about the environment where they\u2019re using it? What about personality? We want to collect such comprehensive multi-modal data and use machine learning models to analyze it and develop recommendations for each person.\u201d<\/p>\n

The recommendations might include pacing voice usage, projecting the voice efficiently and allowing the voice to recover. Ghasemzadeh envisions this model being predictive and \u2014 this is the part he stresses most \u2014 personalized.<\/p>\n

\u201cThe approach to general medicine started with an assumption that while we\u2019re different on the outside, we are very similar inside. Patients with similar ailments took the same medications and [the] same dosages. But we now know that people don\u2019t always respond to pills the same way. If we can quantify how we\u2019re different inside, we can create a computational model to predict responses to medications and optimize treatment plans.\u201d<\/p>\n

To integrate artificial intelligence<\/a> (AI) into vocal fatigue solutions, subjects in Ghasemzadeh\u2019s study will wear sensors that track how and where they use their voices. He\u2019ll prompt them to perform specific vocal tasks and monitor their phonatory function throughout the day. The AI model will analyze these patterns in real time to identify early signs of vocal strain and predict when fatigue is likely to occur.<\/p>\n

“We are different. Every prescribed solution should be different, too.”<\/p><\/blockquote>\n

Participants will also visit his lab at the Communication Technologies Research Center<\/a> in Central Florida Research Park, where specialists will collect imaging, aerodynamic and acoustic data. The highly equipped facility brings together America\u2019s leading hearing and voice scientists to develop new technologies and clinical tools for people with hearing loss or voice disorders.<\/p>\n

With all of that in hand, including the technology, Ghasemzadeh and his team hope to unwind the mystery of vocal fatigue \u2014 one person at a time.<\/p>\n

\u201cThat\u2019s the idea I want to put forward with every project,\u201d he says. \u201cWe are different. Every prescribed solution should be different, too.\u201d<\/p>\n

From Engineering to Human Connection<\/h2>\n

Many would think a toy-reassembling boy is destined to become an engineer. That\u2019s what Ghasemzadeh thought, too. He earned bachelor\u2019s and master\u2019s degrees in electrical engineering and began his career with a focus on telecommunications and signal processing.<\/p>\n

\u201cThere was something important missing,\u201d he says. \u201cHuman connection.\u201d<\/p>\n

“Speech became my research interest because … it sets us apart as a species and as individuals.”<\/p><\/blockquote>\n

He crossed paths with a close friend who mentioned his own research in a field Ghasemzadeh was vaguely familiar with: communication sciences and disorders. The conversation sparked Ghasemzadeh’s enthusiasm for applying his expertise in areas such as signal processing to personally help others.<\/p>\n

\u201cSpeech became my research interest because it\u2019s the signal we predominantly use to communicate,\u201d he says. \u201cIt sets us apart as a species and as individuals.\u201d<\/p>\n

For example, it\u2019s quite easy to identify Ghasemzadeh without even seeing him. He sounds young yet intelligent enough to have dual doctoral degrees. There\u2019s an inflection of humility in his voice. The curiosity is always there, too. In fact, his peers have noticed, from his work, what his parents noticed among his broken toys: his curiosity leading to great things. Shortly after arriving at UCF, the American Speech-Language-Hearing Association chose Ghasemzadeh for its Early Career Contributions in Research Award.<\/p>\n

\u201cIt\u2019s also a reminder that I\u2019m early in my career,\u201d he says, \u201cand the sky is the limit.\u201d<\/p>\n

At the center of his work as a principal investigator is a belief that progress doesn\u2019t happen alone, but through teamwork.<\/p>\n

\u201cYou have to surround yourself with different skillsets, all of us willing to take things apart that have never been taken apart, with everyone focused on one goal,\u201d Ghasemzadeh says. \u201cWhen you win, I win and everyone wins.\u201d<\/p>\n

\n

Research reported in this publication was supported by the National Institute on Deafness and Other Communication Disorders of the National Institutes of Health under award number R00DC021235. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

For Assistant Professor Hamzeh Ghasemzadeh, finding solutions to unsolved communication problems was what he was always destined to 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