Yashish M. Siriwardena

Senior Research Scientist, Hippocratic AI

Speech and audio AI researcher: speech synthesis, speech-to-speech systems, and speech production.

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About

I am a Senior Research Scientist at Hippocratic AI, where I work on speech and voice AI for healthcare conversational agents. Before that I was a Senior Research Engineer at OmniSpeech, building speech enhancement and audio deepfake detection systems.

I completed my PhD and MS in Electrical and Computer Engineering at the University of Maryland, College Park, advised by Prof. Carol Espy-Wilson and Prof. Shihab Shamma. My dissertation explored acoustic-to-articulatory speech inversion and learning interpretable articulatory representations of speech inspired by sensorimotor learning. I also built multimodal systems that combine articulatory features, facial action units and text to detect mental health conditions, emotion and child pronunciation disorders.

Interests

• Text-to-speech
• Speech-to-speech
• Speech and audio enhancement
• Audio deepfake detection
• Voice and accent conversion
• Speech and music synthesis
• Articulatory speech production
• Multimodal systems
• Vocal biomarkers for mental health

Experience

Industry Academic

1. Sep 2025 – Present
   Hippocratic AI, Menlo Park, CA
   • Senior Research ScientistJun 2026 – Present
   • Senior Research EngineerSep 2025 – Jun 2026
2. Jan 2024 – Sep 2025
   OmniSpeech, College Park, MD
   • Senior Research Engineer
3. Jun 2023 – Sep 2023
   Dolby Laboratories, San Francisco, CA
   • Research Intern, Multimodal Science
4. May 2022 – Aug 2022
   Skylyte, New York, NY
   • Machine Learning Engineer Intern
5. May 2020 – Dec 2023
   University of Maryland, College Park, MD
   • Graduate Research Assistant, Speech Communication Lab
6. Aug 2018 – May 2020
   University of Maryland, College Park, MD
   • Graduate Teaching Assistant
7. Oct 2015 – Jul 2018
   Synergen Technology Labs, Nugegoda, Sri Lanka
   • Research EngineerMay 2017 – Jul 2018
   • Research InternOct 2015 – Apr 2016

Details on the CV page.

Education

• 2023 PhD, Electrical and Computer Engineering, University of Maryland, College Park Dissertation: Towards Extending Acoustic-to-Articulatory Speech Inversion and Learning Articulatory Representations. Advisers: Carol Espy-Wilson, Shihab Shamma.
• 2022 MS, Electrical Engineering, University of Maryland, College Park
• 2017 BSc (Honours), Biomedical Engineering, University of Moratuwa, Sri Lanka

News

• Sep 2026Preprint posted: HARP, agentic hybrid retrieval and analysis for long-form audio.
• Jun 2026Promoted to Senior Research Scientist at Hippocratic AI.
• Sep 2025Joined Hippocratic AI as a Senior Research Engineer.
• Aug 2024Paper on speaker-independent speech inversion for velopharyngeal port constriction published in JASA.
• May 2024Papers accepted at Interspeech 2024, EUSIPCO 2024 and IEEE EMBC 2024.
• Jan 2024Joined OmniSpeech as a Senior Research Engineer.
• Dec 2023Completed my PhD in Electrical and Computer Engineering at the University of Maryland.
• Apr 2023Selected for the IEEE ICASSP Rising Stars program.