• PAS1: 2002 Groningen, Netherlands. Groningen Voice Research Laboratory, University of Groningen.
  • PAS2: 2004 Denver, Colorado, USA. National Center for Voice and Speech (NCVS).
  • PAS3: 2006 York, England. University of York.
  • PAS4: 2009 San Antonio, Texas, USA. University of San Antonio Department of Music.
  • PAS5: 2010 Stockholm, Sweden. KTH Royal Institute of Technology.
  • PAS6: 2012 Las Vegas, Nevada, USA. University of Nevada, Las Vegas.