Dr. Krzysztof Izdebski
Krzysztof Izdebski, F.K.,M.A.,Ph.D.,CCC-SLP.,F.A.S.H.A.
Dr. Krzysztof Izdebski, is an internationally recognized clinician-scientist, and a voice-speech patho-physiologist, licensed by the Board of Medical Quality to practice in the State of California. He is a founder and Chairman of Pacific Voice and Speech Foundation, a non-profit organization dedicated to voice and speech dysfunction and a Chairman of the Annual Pacific Voice Conference, a yearly gathering of voice experts. He is also a co-founder and the treasurer of the World Voice Consortium, an international body of individuals and institutions dedicated to the study and care of the human voice.
He is a system-wide clinical consultant for the Department of Otolayrngology-Head & Neck Surgery and Speech Pathology at Kaiser Permanente Medical Foundation, and is also an Associate Clinical Professor at the Stanford Voice and Swallowing Center, and Department of Otolayrngology-Head & Neck Surgery, at the Stanford University School of Medicine, Stanford, CA, USA. He is also a scientific consultant to the San Francisco based Brain Plasticity Institute, and serves on the advisory board of the Bioengineering Division of Engineering of Santa Clara University, in Santa Clara, California.
Dr. Izdebski is a member of CoMeT, a coordinator of the Performing Arts Medicine Coalition of San Francisco, and the only non-EU member of the EU group on Advanced Study of the Voice. A multilingual speaker, Dr. Izdebski is a frequent visiting scholar and a lecturer at numerous European, Asian and South American institutions of learning and a various conferences.
For his contribution to the field of voice care, Dr. Izdebski received numerous prestigious awards, and is an ASHA Fellow. He authored over 100 peer reviewed scholarly publications on voice functions and restorations of head and neck functions. Dr. Izdebski also served on various ASHA Committees including Advanced Practices in Speech Pathology, Medical Speech Devices and is a member of the Special Division 3 on Voice and Voice Disorders. He serves on editorial boards of many professional journals, and is an Editor-In-Chief of, a soon be reissued in electonic form, e-Phonoscope, an open access journal for voice care, serving as an official publication journal of the PVSF.
His current interests continue to revolve around phonatory movement disorders, emotions in the human voice, voice in performing arts, voice applications to products and industry, occupational voice and speech disorders and medico-legal assessment and documentation of voice and speech.
3838 California Street
San Francisco, California 94118
Location Phone: (415) 751-4914
Location Fax: (415) 751-1414
Accepting new patients:
I am accepting new patients.
Graduate School Education:
Ph.D., Speech and Hearing Sciences – Speech Pathology : 1976
University of California, San Francisco, San Francisco, CA. 1972 – 1976.
Title of Doctoral Theses: “Minimal Phonatory Reaction Times.”
University of California, Los Angeles, CA.
General School Education:
Filosofie Kandidat (F.K.), Phoentics-Linguistics-Speech, Royal University of Lund, Lund, Sweden.
Post-Doctoral Research Fellow : 1982
Voice and Speech Physiology.
University of Groningen, Groningen, The Netherlands. 1982.
Post Doctoral Scholar, Laryngeal Physiology and Anatomy : 1979
University of California, San Francisco, San Francisco, CA. 1976 – 1979.
Board of Directors and Founding Member : 1994, The World Voice Consortium.
Director: Pacific Voice and Speech Foundation : 1993
Founder and Director : 1990, Pacific Voice Care, San Francisco, California.
Voice Speech and Swallowing Evaluation Seminars UCD and PVC : 1989 – Present
Faculty : 1988 – Present, Speech and Hearing Science Doctoral Program & Department of Otolayrngology Head and Neck Surgery, University of California, San Francisco, San Francisco, California.
Founder and Director : 1988, Voice Physiology Laboratory and Head and Neck Function Clinic, Pacific Presbyterian Medical Center, San Francisco, California.
Consultant, Speech Pathology : 1987 – Present, Veterans Administration Medical Center, Martinez, California. Department: Speech Pathology and Audiolgoy, Otolayrngology, Head and Neck Surgery.
Founder and Chairman : 1987 – Present, Annual Pacific Voice Conference.
Chief, Speech Pathology and Audiology : 1987 – 1990, Pacific Presbyterian Medical Center, San Francisco, California.
Associate Clinical Professor : 1986 – Present, Department of Otohinolaryngology Head and Neck Surgery, School of Medicine, University of California, Davis, Sacramento, California.
Chief, Speech Pathology : 1985 – 1987, VA Medical Center, Martinez, California.
Private Practice in Speech Pathology : 1985
Co-Founder : 1985, VA Regional Head and Neck Function Rehabilitation Unit, VA Medical Center, Martinez, California.
Research Associate : 1985, Department of Otolayrngology, Head and Neck Surgery, University of California, San Francisco, San Francisco, California.
Speech Pathologist and Director : 1984, Clinical Speech Laboratory, PPMC, San Francisco, California. All forms of Speech, Language, Voice and Swallowing Disorders.
Speech Pathology Fellow : 1983, Veterans Administration Medical Center, San Francisco, California. Projects: Stuttering Evaluation and Treatment, Neurogenic and Functional Voice and Speech Disorders, Laryngectomee Rehabilitation.
Director, Voice Science Laboratory : 1978 – 1985, Department of Otolaryngology School of Medicine and Group in Speech and hearing Sciences Graduate Division, University of California, San Francisco, California.
Assistant Professor in Residence : 1977 – 1985, Department of Otolayrngology, University of California, San Francisco, School of Medicine, San Francisco, California.
Postgraduate Research Physiologist, II : 1976 – 1977, Department of Otolayrngology, University of California, San Francisco, School of Medicine, San Francisco, California. Projects: Larngeal Motor Control, RLN Microanatomy, Voice Physiology.
Lecturer in Phonetics : 1976, Articulatory and Acoustic Phonetics, Holy Names College, Oakland, California.
Lecturer in Special Education : 1974 – 1976, Anatomy and Physiology of the Speech Mechanism, San Francisco State University, San Francisco, California.
Research Trainee, Speech Research Laboratory : 1973 – 1976, Principal Professor: T. Shipp, Ph.D., Physiology of Phonation, Veterans Administration Medical Center, San Francisco, California. Projects: EMG, Phonation Control; Detection of Deception in Speech; Tremors, Dystonia, Vibrato.
Teaching Assistant : 1973, Principal Professor: T.D. Hanley, Ph.D., Department of Audiology and Speech, University of California, Santa Barbara, Santa Barbara, California.
Research Assistant : 1972, Principal Professor: W. Perkins, Ph.D., Department of Communicative Disorders, University of Southern California, Los Angeles, Los Angeles, California. Projects: Stuttering Assessment and Features.
Research Assistant : 1972, M. Cooper, Ph.D., Voice and Speech Pathology, Linde Medical Plaza, Los Angeles, California. Objective Evaluation of Voice-Speech Treatment.
Research Assistant : 1971 – 1972, Principal Professor: P. Ladefoged, Ph.D., Department of Linguistics, Phonetics Laboratory, University of California, Los Angeles, Los Angeles, California.
Certificate of Clinical Competence, Speech Pathology
Awarded by: The Clinical Certification Board of the American Speech-Language-Hearing Association.
License in Speech Pathology
Awarded by: The California Board of Medical Quality Assurance.
In Practice Since:
- Extended Practice Issues, ASHA : 1999
- Member: Voice: A Special Interest Division, ASHA : 1994
- Founding Member: The World Voice Consortium : 1994
- Committee on Medical Speech Devices, ASHA : 1991 Member
- California Speech Pathologists in Private Practice : 1988
- The International Association for Experimental Research in Singing (officer) : 1976 – 1988
- American Speech-Language-Hearing Association : 1974 – Present
Honors and Awards:
- Guest Principal Speaker. Congress of Arts Medicine: Agrigento, Sicily, December 6-7, 2008: www.medart.pillole.com : 2008
- Guest Professor: School of Medicine, Zagreb, Croatia. April 2008 : 2008
- Honorary President together with Mr. Andrea Bocelli. La Voce Artistica, Voce Cinema e Canto, Forte dei Marmi, Italy, 23-25 September, 2010: www.vocear : 2008
- Guest Professor: XII-th International Symposium on Laryngeal : 2007
- Guest Professor: X-th International Symposium on Laryngeal : 2005
- Honorary Member: Fundacion Mexicana de la Voz : 2004
- Guest Professor: V Belinov Symposium, Slontchy Breg, Bulgaria : 2004
- Honorary Member: The Austrian Voice Institute : 2004
- Guest Professor: The World Voice Day; Lisaboa, Portugal : 2003
- Chairman: XIII Annual Pacific Voice Conference; San Francisco : 1998
- Honorary Chairman: II Dutch Meeting on Speech and Voice in Laryngology and the XII Annual Pacific Voice Conference. Amsterdam : 1998
- The Dystonia Foundation: Quality of life issues in ADD-uctor spasmodic dysphonia: Lisa Orloff, MD., PI : 1997
- Honorary Chairman: Brazilian Voice Congress : 1997
- Chairman: XIII Annual Pacific Voice Conference; San Francisco : 1997
- Award/Grant to update Pacific Voice and Speech Foundation Voice Laboratory : 1996
- Elected Fellow of American Speech and Hearing Association : 1996
- Elected Member of Collegium Medicorum Theatri : 1995
- Award: Instrumentation for PPMC Voice Laboratory : 1988
- Performance Award : 1985
- Presented by the Veterans Adminstratin for significant contribution and exceeding performance requirements, Martinez, California.
- Outstanding Rating Certificate : 1985
- Awarded for significant contribution to the mission of the VA, Martinez, California.
- Second Place Award in the area of “Excellence of Presentation” : 1984
- Awarded by ASHA, November 1984, San Francisco, California.
- Second Place Award in the area of “Scientific Merit” : 1984
- Awarded by ASHA, San Francisco, November 1984, San Francisco, California.
- Certificate of Appreciation : 1984
- Recognition of a Significant Contribution to the American Speech-Language-Hearing Association and to the Profession of Speech-Language Pathology and Audiology. Presented by ASHA, November 1984, San Francisco, California.
- Award from the Cancer and Medical Foundation, Inc. : 1983
- Awarded for studying cancer problems in connection with speech. Studies in the Development and Implementation of the Groningen Voice Prosthesis.
- Certificate of Appreciation for Significant Contribution to the Profession of Speech Pathology and Audiology. : 1982
- Awarded by the American Speech-Language Hearing Association. Toronto, Canada.
- Principal Investicator, Voice Fundamental Frequency Targeting and Control, REAC, U.C.S.F. : 1978-1979
- Past Chairman of the International Liaison of the International Association of Experimental Research in Singing : 1977-1988
- Co-Principal Investigator, Acoustic and Physiologic Factors in Spastic Dysphonia, NIH. : 1977-1982
- Principal Investigator, Neuromechanical Studies of Laryngeal Reaction Times. : 1975-1976
- Earl C. Anthony Trust Fund for Graduate Research, U.C.S.F., and Chancellor’s Patent Fund, U.C.S.F.
Laryngeal nerve in spastic dysphonia. : 1997
IZDEBSKI, K., Townsend, J., Merzenich, M.M., and Dedo, H.H. Phonia-Arthria I, Buch, N.H. (Ed.), Special-Paedegogisk Forlag, Copenhagen, Denmark.
Electrical Stimulation for Cochlear Implant Selection and Rehabilitation. : 1992
Morgan, DE., Fratalli CM, Bosone ZT, Cyr, DG, Hayes D, IZDEBSKI, K., et al. ASHA, Sup. 7, vol 34:3, 13-16.
Vocology: A new curriculum. : 1992
IZDEBSKI, K. J Voice, 6:10-14.
Balance System Assessment. : 1992
Morgan, DE., Frattali CM, Bosone ZT, Cyr, DG, Hayes D, IZDEBSKI, K, et al. ASHA, Sup. 7, vol 34:3, 9-12.
Symptomatology of adductor spasmodic dysphonia: A physiologic model. : 1992
IZDEBSKI, K. J Voice, 6: 306-319.
Electrical Stimulation for Cochlear Implant Selection and Rehabilitation. : 1992
Morgan, DE., Frattali CM, Bosone ZT, Cyr, DG, Hayes D, IZDEBSKI, K., et al. ASHA, Sup. 7, vol 34:3, 13-16.
Ventricular Dysphonia: A profile of 40 Cases. : 1992
Von Doersten PG, IZDEBSKI, K, Ross, JC, Cruz RM. Larynscope, 102: 1296-1301.
Evaluation and Treatment for Tracheoscophageal Fistulization/Puncture. : 1992
Morgan, DE., Frattali CM, Bosone ZT, Cyr, DG, Hayes D, IZDEBSKI, K., et al. ASHA, Sup. 7, vol 34:3, 17-21.
Externanal Auditory Canal Examination and Cerumen Management. : 1992
Morgan, DE., Frattali CM, Bosone ZT, Cyr, DG, Hayes D, IZDEBSKI, K., et al. ASHA, Sup. 7, Vol 34:3, 22-24.
Rigid Transoral Laryngovideostroboscopy (Phonoscopy). : 1990
IZDEBSKI, K., Ross, J.C., Klein, J.C. Seminars in Speech and Hearing, Feb. 1990, Thieme, N.Y.
An Intraoral Stent for Improving Radiographic Examination of Swallowing in a Case Involving Gun-Shot Wound to the Face. : 1989
IZDEBSKI, K., Buchanan, R., Ma, T., and Miller, F. Dysphagia.
Nerve Transfer versus Teflon Injection for Vocal Cord Paralysis. A Comparison. : 1988
Crumley, R.L., IZDEBSKI, K. and McMicken, B. Laryngoscope: 98: 1200-1204.
Voice and Voice Disorders. Clinical Review. : 1988
IZDEBSKI, K. and Klein, J.C. Pacific Med Views, Fall: 2-3.
Mycologic factors affecting performance of voice prosthesis. : 1987
IZDEBSKI, K., Ross, J.C., Lee, S. Laryngoscope, 97: 594-597.
An interim prosthesis for a glossectomy patient. : 1987
IZDEBSKI, K., Ross, J.C., Roberts, W.L. and deBoie, R.G. J Prosthodontics, 57: 608-611.
The recurrent laryngeal nerve (RLN) in spastic dysphonia: A light and electron microscopic study. : 1987
Carlsoo, B., IZDEBSKI, K., Dahlqvist, A., Domeij, S. and Dedo, H.H. Acta Otlaryngol Scand, 103: 96-104.
Voice quality following laryngeal innervation by ansa hypoglossi transfer. : 1986
Crumley, R.L. and IZDEBSKI, K. Laryngoscope, 96: 611-616.
Model of spastic dysphonia. In Gates, G.A. (Ed.), Spastic Dysphonia: State of the Art. : 1985
IZDEBSKI, K., and Shipp, T. The Voice Foundation, New York.
La voix humaine. : 1985
IZDEBSKI, K. Quintessence 89: 14-17.
Intrinsic laryngeal muscle activity in a spastic dysphonia patient. : 1985
Shipp, T., IZDEBSKI, K., Reed, C. and Morrisey, P. J Speech Hearing Dis 50: 54-59.
Physiologic stages of vocal reaction times. : 1984
Shipp, T., IZDEBSKI, K., Morrisey, P. J Speech Hear Res, 27, 1984.
Overpressure and breeathiness in spastic dysphonia. An acoustic (LTAS) and perceptual study. : 1984
IZDEBSKI, K. Acta Otolaryngol Scand 97: 122-129.
Spastic dysphonia. A patient profile of 200 cases. : 1984
IZDEBSKI, K., Dedo, H.H. and Boles, L. Am J Otolaryngol 5: 7-14.
Pain-induced vocalization in the rat and its modification by pharmacological agents. : 1984
Levine, J., Feldmesser, M. Tecott, Gordon, N.C., IZDEBSKI, K. Brain Research 290: 307-315.
Evaluation and treatment of recurrent spasticity after RLN section: A preliminary report. : 1984
Dedo, H. H., and IZDEBSKI, K. Otolaryngol Head Neck Surg 93: 343-345.
Practical techniques of office voice recordings. : 1983
IZDEBSKI, K. Otolaryngol Head Neck Surg 91: 338-342.
Problems with surgical (RLN section) treatment of spastic dysphonia. : 1983
Dedo, H.H. and IZDEBSKI, K. Laryngoscope, 93: 200-215.
Clinical and research aspects of spastic dysphonia. : 1983
IZDEBSKI, K. Scand J Logop Phoniatr 8: 35-37.
Carotid-like body in the recurrent laryngeal nerve. An endoneural chemosensitive micro-organ? : 1983
Carlsoo, B. Dahlqvist, A., Domeji, S., Hellstrom, S., Dedo, H.H. and IZDEBSKI, K. Am J Otolaryngol, 4: 334-341.
Intermediate results of 306 RLN sections for spastic dysphonia. : 1983
Dedo, H.H. and IZDEBSKI, K. Laryngoscope, 93: 9-16.
An endoneural microglomus of the recurrent laryngeal nerve. : 1982
Carsoo. B., Domeij, S., Hellstrom S., Dedo, H.H., and IZDEBSKI, K. Acta Otolaryngol Supp, 386, 184-186.
Selecting the side of the RLN section for spastic dysphonia. : 1981
IZDEBSKI, K. and Dedo, H.H. Otolaryngol Head Neck Surg, 89: 423-426.
Current evidence for the existence of laryngeal macrotremor and microtremor. : 1981
Shipp, T. and IZDEBSKI, K. J Forensic Science, 26: 501-505.
Surgical treatment of spastic dysphonia. : 1981
Dedo, H.H. and IZDEBSKI, K. Contemporary Surgery, 19, 75-90.
Postoperative and follow-up studies of spastic dysphonia patients treated by recurrent laryngeal nerve section. : 1981
IZDEBSKI, K., Dedo, H.H., Shipp, T. and Flower, R.M. Otolaryngol Head Neck Surg, 89: 96-101.
Magnetic sound recording in laryngology. : 1981
IZDEBSKI, K. Am J Otolaryngol, 2: 48-53.
Long-time-average spectra (LTAS) applied to analysis of spastic dysphonia. : 1980
IZDEBSKI, K. Transcripts IXth Symposium Care of the Professional Voice, Part I: Physical Factors, Vocal Function and Control, Van Lawrence, (Ed.) The Voice Foundation, New York, 89-94.
Effects of prestimulus interval on phonation initiation reaction times. : 1980
IZDEBSKI, K. J Speech Hear Res, 23: 485-489.
A vocal-tract reaction-time device. : 1980
IZDEBSKI, K. and Mentzer, E. J Acoust Soc Am, 68: 710-11.
Glottal waveform variability: A preliminary inquiry. : 1980
IZDEBSKI, K. and Murry, T. Transcripts IXth Symposium Care of Control, Van Lawrence (Ed.) The Voice Foundation, New York, 39-43.
The effects of vertical laryngeal position on singers’ sustained vowel formants. : 1979
IZDEBSKI, K. and Shipp, T. J Res in Singing, 2: 1-8.
Predicting postoperative voice characteristics of spastic dysphonia patients. : 1979
IZDEBSKI, K., Shipp, T. and Dedo, H.H. Otolayrngol Head and Neck Surg, 87: 428-434.
Clinical aspects of spasmodic dysphonia. : 1978
Aminoff, M., IZDEBSKI, K. and Dedo, H.H. J. Neurol Neurosurg Psychiat, 41:361-365.
Current evidence for the organic etiology of spastic dysphonia. : 1978
Dedo, H.H., Townsend, J.J., and IZDEBSKI, K. Otolaryngology, 86: 875-880.
Shifts in formant frequencies as a function of vocal pitch. : 1978
IZDEBSKI, K. and Shipp, T. Transcripts VII Symposium Care of the Professional Voice, Part 1: The Scientific Papers, Van Lawrence (Ed) The Voice Foundation, New York, 30-35.
Contribution to speech communication. Speech and Hearing Sciences. : 1977
IZDEBSKI, K. Australian SCAN of Communication. 3:17-20.
Recurrent laryngeal nerve histopathology in spastic dysphonia: A preliminary light and electron microscope study. : 1977
Dedo, H.H., IZDEBSKI, K. and Townsend, J.J. Ann Otol, 88: 806-812.
Vocal frequency and vertical larynx postioning by singers and non-singers. : 1975
Shipp, T., and IZDEBSKI, K. J Acoust Soc Am, 58: 1104-1106.
Minimal reaction times for phonatory initiation.
IZDEBSKI, K. and Shipp, T. J Speech Hear Res, 21: 638-651.