Siobhan Doherty Buffett is the Head of Voice and Speech at The Art of Acting Studio, the Los Angeles campus of Stella Adler Studio of Acting. She is a certified Knight-Thompson Speechwork™ teacher, and serves on the KTS Executive Council. She is also an illustrator who recently collaborated with Philip Thompson on the graphics for Experiencing Speech: A Skills-Based, Panlingual Approach to Actor Training (2nd. ed) and Experiencing Accents: A Knight-Thompson Speechwork Guide to Acting in Accent, both published by Routledge. Her company, Speaking of Accents, offers accent and dialect coaching for individuals and productions. Siobhan has worked as an actor in the US with Utah Shakespeare Festival, San Francisco Shakespeare Festival, South Coast Rep, PCPA, and Berkeley Repertory Theater. She has taught at UC Berkeley, UC Irvine, Rider University, California School of the Arts San Gabriel Valley and the Actor’s Studio of Orange County. MFA UC Irvine. BA UC Berkeley. Member of AEA and VASTA.

Upcoming Short Courses

Bringing Colour Theory into IPA Vowels!
Monday 30th November 2026
6:00 PM - 8:00 PM
(London Time)

Bringing Colour Theory into IPA Vowels!

Siobhan Doherty Buffett

Step into a multi-sensory approach to phonetics with Siobhan Doherty Buffett, certified teacher of Knight-Thompson Speechwork™. In this engaging session, Siobhan introduces a new Colour Theory Map of the International Phonetic Alphabet (IPA) Vowel Chart - a visual tool designed to demystify complex phonetic concepts, deepen anatomical awareness, and transform how we teach and practice narrow transcription. Whether you are a voice teacher, speech-language pathologist, linguist, or performer, this interactive exploration offers a fresh, intuitive lens to help both you and your students visualize the subtle mechanics of vowel production!