PeopleofSuperintelligence

Researcher

David Nahamoo

David Nahamoo is a speech and conversational AI researcher whose work brought speech recognition into IBM products and Watson Conversation. He grew up in Hamadan, moved to Tehran at age 12, and earned electrical-engineering degrees at Tehran University, Imperial College London, and Purdue. At IBM Research, he joined the speech-recognition team in 1982, developed acoustic-modeling techniques, led speech-product delivery, and shaped Watson Conversation. He became an IBM Fellow in 2008, joined the ISCA Fellows class in 2015, and received IEEE's 2021 James Flanagan award for speech and audio processing. He joined Pryon as Chief Technology Officer and head of R&D in 2018 and was its CTO in 2022.

Now at
Pryon
Works
103
Citations
3,191
h-index
29
Badges

Publication numbers from OpenAlex, as of 19 October 2026.

Timeline

  1. By 1982

    From Tehran to Purdue

    He grows up in Hamadan and moves to Tehran at age 12. At Tehran University, he earns an electrical-engineering bachelor's degree in 1970, followed by a master's at Imperial College London in 1976 and a Ph.D. at Purdue in 1982.

  2. 1982

    Joining IBM’s speech team

    He joins IBM Research’s speech-recognition team in 1982. During his early IBM years, he develops statistical machine-learning techniques for acoustic modeling and noise robustness.

  3. 1993–2006

    IBM speech products and CTO

    From 1993 to 2006, he delivers speech technologies to IBM divisions for desktop, embedded, and server products. IBM Research makes him Speech CTO in 2006.

  4. 2008

    IBM Fellow

    He becomes an IBM Fellow in 2008.

  5. 2012

    Leading Watson Conversation

    At IBM, he becomes an active technical lead in cognitive computing in 2012, shaping conversational systems and Watson Conversation products.

  6. 2015

    An ISCA Fellowship

    ISCA names him a Fellow in its 2015 class.

  7. 2021

    The Flanagan Award

    IEEE gives him the 2021 James L. Flanagan Speech and Audio Processing Award for contributions to research and deployment of spoken-language technologies.

  8. 2022

    CTO at Pryon

    At Pryon, he is Chief Technology Officer in 2022, after joining as CTO and Head of Research & Development in 2018.

Career

  1. From 2018PryonChief Technology Officer and Head of Research & Development
  2. 2008–2018IBMIBM Fellow, Technical Lead, Cognitive Computing
  3. From 1982IBM ResearchSpeech CTO

Education

  1. 1982Purdue UniversityPhD
  2. 1976Imperial College LondonMaster's degree
  3. 1970University of TehranBachelor's degree in Electrical Engineering

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. Speaker adaptation of neural network acoustic models using i-vectors2013 · IEEE Workshop on Automatic Speech Recognition and Understanding (ASRU) · 589 citations
  2. An inequality for rational functions with applications to some statistical estimation problems1991 · IEEE Transactions on Information Theory · 197 citations
  3. Speech recognition using noise-adaptive prototypes1989 · IEEE Transactions on Acoustics Speech and Signal Processing · 177 citations
  4. Tied mixture continuous parameter modeling for speech recognition1990 · IEEE Transactions on Acoustics Speech and Signal Processing · 155 citations
  5. Direct Acoustics-to-Word Models for English Conversational Speech Recognition2017 · Interspeech (USB) · 116 citationsWith Bhuvana Ramabhadran

From OpenAlex, as of 19 October 2026.

  1. 14% of AI doctorate holders from 2010 to 2016 founded or led a company or lab by 10 years after graduationIncludes David Nahamoo. We estimate how often AI doctorate holders founded or led a company or lab by 10 years after their doctorate, and how the timing changed across cohorts.
  2. Google alumni founded or led 87 other organizations, the most among the labs we compareIncludes IBM. We trace 212 organizations founded or led by AI lab alumni, and 223 career moves between the labs.
  3. The company share of AI researchers’ top papers rose from 2% to 32%Includes IBM. We estimate where leading AI researchers worked when their most-cited papers appeared. The company share rose from 2% in 1975–1979 to 32% in 2020–2024.
  4. Google has the highest combined h-index among AI organizationsIncludes IBM. Our estimates of combined and median h-index at AI organizations, using current affiliations and OpenAlex records.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

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  1. Tomorrow’s AI Will Reason Like Humans, IBM Watson Developer Predicts spectrum.ieee.org. Checked 19 October 2026.
  2. Dr. David Nahamoo - Elmore Family School of Electrical and Computer Engineering - Purdue University engineering.purdue.edu. Checked 19 October 2026.
  3. IBM Impact: Fellows ibm.com. Checked 19 October 2026.
  4. ISCA - ISCA Fellow Program isca-speech.org. Checked 19 October 2026.
  5. 2021 IEEE Technical Field Award Recipients Announced signalprocessingsociety.org. Checked 19 October 2026.
  6. Dr. David Nahamoo Joins Pryon as Chief Technology Officer to Accelerate Delivery of Company’s Augmented Intelligence Platform engineering.nyu.edu. Checked 19 October 2026.
  7. KMWorld 2022 Speaker and Panelist Directory kmworld.com. Checked 19 October 2026.