About Verdolini Voice

Verdolini Voice was created to make high-quality voice therapy and training education accessible, systematic, and well-linked to practice. We offer online training programs, published manuals, clinical resources, coaching, and continuing learning opportunities for SLPs, voice clinicians, and professional voice users. Our work connects voice science with practical applications, so learners can understand not only the steps of a method, but also the reasoning and science behind them.

What We Do

We provide evidence-based voice therapy training and resources through:

Online courses in voice therapy methods developed and taught by Dr. Verdolini Abbott
Published manuals and clinical resources for clinicians, patients and professional voice users
Coaching and consultation for continued clinical and pedagogical support
Certificate renewal opportunities to help learners stay connected and current

Who We Serve

Verdolini Voice supports clinicians and voice professionals who seek structured, research-informed training in voice therapy.

This includes SLPs, voice clinicians, clinicians in training, educators, researchers, and professional voice users who seek to deepen their understanding of voice therapy and training and their practical applications.

How We Work

We believe voice therapy and training are more than a set of exercises. Effective training should help practitioners understand the science and experience behind the methods, the reasoning behind clinical and pedagogical decisions, and the process of helping people carry new vocal behaviors into real-life communication and performance.

Our goal is to support learning that continues beyond a single course through practical resources, reflection, coaching, and professional connections.

Contact Us

Verdolini Voice LLC is based in the United States and provides online and real-time training and clinical resources for clinicians and voice professionals. For questions about courses, manuals, coaching, certificates, renewal, or account access, please leave us a message at HELP page or contact us at: [email protected]

About Dr. Katherine Verdolini Abbott

Katherine “Kittie” Verdolini Abbott, PhD, CCC-SLP, PAVA-RV, MDiv, is Professor of Communication Sciences and Disorders at the University of Delaware. She is a clinician, researcher, educator, singer, and actor whose work centers on voice and voice disorders.

Her path into voice grew from both science and personal experience. Before entering speech-language pathology, she performed across classical, musical theatre, Renaissance, folk-rock, and related vocal traditions and theatre in the US and Italy. After sustaining a vocal fold injury, she returned to the United States to study speech-language pathology to better understand voice problems from both clinical and performing perspectives.

Dr. Verdolini Abbott’s research and teaching span voice science, cognitive science, perceptual-motor learning, emotions, vocal fold biology, pediatrics, and clinical trials. Across her career, she has connected voice science with clinical practice and performing arts traditions.

Her research has been funded by the National Institutes of Health since 1997. Personally trained by Arthur Lessac, Mark Madsen and Craig Wich, she developed Lessac-Madsen Resonant Voice Therapy (LMRVT), Casper-Stone Confidential Flow Therapy (CSCFT) and Adventures in Voice (AiV) for children.

Dr. Verdolini Abbott has held academic and clinical appointments at leading institutions, including the University of Iowa, Harvard Medical School, the University of Pittsburgh, and the University of Delaware. She is also an ASHA Fellow and a recipient of ASHA Honors, the Association’s highest recognition, awarded in 2009.

Verdolini Voice brings her research, clinical experience, teaching, and performance background into structured courses, manuals, and continuing learning opportunities for clinicians and voice professionals.

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About Dr. Nassim Ahmadi

Nassim Ahmadi, PhD, SLP, is the Founder and Program Director of Verdolini Voice. She earned her BSc, MSc, and PhD in Speech-Language Pathology from Iran University of Medical Sciences with an emphasis on voice.

Her clinical and research work has focused primarily on functional voice disorders ("muscle tension dysphonia") in professional voice users. In 2016, she established Iran’s first Vocology Center, bringing together a multidisciplinary team that included laryngologists, voice coaches, speech-language pathologists, and dietitians.

Her research has examined voice therapy outcomes, and treatment approaches for functional voice disorders ("muscle tension dysphonia"). Her doctoral work included the development of "Edge Therapy", a novel voice therapy approach designed for individuals with insufficient vocal fold closure.

Dr. Verdolini Abbott served on Nassim’s PhD dissertation committee in 2018, and their collaboration later continued when Nassim joined Dr. Verdolini Abbott as Visiting Scholar and later Postdoctoral Research Fellow in the University of Delaware’s Voice and Motor Learning Lab in 2021.

She created Verdolini Voice to structure and expand access to Dr. Verdolini Abbott’s trainings, manuals, and continuing education resources.