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SiACo "Sing against Cortisone" Study 2020 - First results

A prospective voice therapy and vocal pedagogic intervention study on asthma and COPD patients with hoarseness after inhaled cortisone therapy.

Ao. Univ. Prof. Dr. Berit Schneider-Stickler, Annett Thoms, Katharina Klavacs,
Univ. Prof. Mag. Dr. PhDr. Wilhelm Frank

In 2020, the SiACo therapy study was conducted jointly by the Institute for Voice Pedagogy at JAM MUSIC LAB - Private University for Jazz and Popular Music Vienna, the University ENT Clinic Vienna and the Center for Communication Medicine.

After a first evaluation of the data, the available results of the voice therapy and vocal pedagogy study SiACo (SingAgainstCortisone) show that voice training based on the One-Voice-Technique ( has a therapeutic effect on patients with a certain hoarseness.
A first comparison of the two study results of this medical study shows that the one-voice training in speech therapy and the one voice training in the choir group are approximately the same. 

The therapeutic results in the subjects of the choir group are a significantly reduced mucus formation on the vocal folds and an improvement in the jitter value (irregularities in the basic frequency of the tone sound). The vocal fold closure was much tighter, could even be doubled (!).

Also the volume, i.e. the sound pressure level (SPL - SoundPressureLevel) could almost be doubled. The duration of tone hold at unvoiced and voiced "s" was considerably longer for the participants after the intervention, while the duration of tone hold at "a" remained more or less the same.

Evaluation of the Voice Handicap Index (VHI) and COPD Assessment Test (CAT) questionnaires showed that the participants were no longer in the pathological range after the 8 units of vocal training and choral singing. 


Research team

Ao.Univ.Prof.Dr. Berit Schneider-Stickler (ENT specialist, phoniatrist)

University ENT Clinic Vienna, Department of Phoniatric Logopedics; Deputy Head of the Department of Phoniatric Logopedics at the University ENT Clinic of the Medical University of Vienna, Deputy President of the Austrian Society for Music and Medicine and trained singer
Studied human medicine in Berlin, received his doctorate in 1995 in the field of classification and diagnostics of functional voice disorders
vocal studies at the Academy of Music "Hanns Eisler" Berlin
Several months of research stays at the University of California, Irvine and the University of Wisconsin-Madison
2003 she habilitated on the clinical relevance of videostroboscopy in the assessment and differential diagnosis of voice disorders and received the Venia docendi at the Medical Faculty of the University of Vienna
Textbook: Schneider B, Bigenzahn W: Voice diagnostics - a guide for the practice.
Springer Publishing House Vienna New York 2007-07-27

Annett Thoms (head of the vocal pedagogy department at JAM MUSIC LAB Private University)

Teaches voice training, anatomy and function of the voice, voice analysis, interpretation, singer acting, didactics singing
Developed the One-Voice-Technique (OVT), a special training method for non-classical singing at speech level to avoid register breaks

Katharina Klavacs, BSc (speech therapist)

Med4Com, Center for Communication Medicine Vienna
Studied instrumental and vocal pedagogy and speech therapy
Member of the Board (Treasurer) Austrian Society for Speech Therapy, Phoniatrics and Pedaudiology

Univ. Prof. Mag. Dr. PhDr. Wilhelm Frank MLS (Statistics)

University Professor of Health Sciences; Management & Health Economics; 
biometrician, economist, medical law, management consultant, science consultant, expert

Authored on November 23rd, 2020