Update July 27:
The study on which the recent interview with Antoine Giovanni (LPL / AP-HM Marseille) on BFMtv.com (June 2020) is based has just been published in the journal "European Archives of Oto-Rhino-Laryngology":
Giovanni, A., Radulesco, T., Bouchet, G. et al. Transmission of droplet-conveyed infectious agents such as SARS-CoV-2 by speech and vocal exercises during speech therapy: preliminary experiment concerning airflow velocity. Eur Arch Otorhinolaryngol (2020). https://doi.org/10.1007/s00405-020-06200-7
Antoine Giovanni, university professor and ENT hospital practitioner attached to the Speech and Language Laboratory (LPL) and the Conception Hospital Marseille, answered questions on BFMTV.com about the potential for speech transmission of infectious molecules, such as Covid-19.
>> Link to the interview
The scientific study on which this interview is based has been accepted for publication in the journal "European Archives of Oto-Rhino-Laryngology", and will be shortly available.
Image credits: Extract from the video showing the visualization of air flow during strong expiration and in the production of speech (A. Giovanni)