PTB (Physikalisch-Technische Bundesanstalt), Braunschweig, Germany (2019.03)

BRI (Building Research Institute), Tsukuba, Japan (2018.10)

PEUTZ LAB, Mook, Netherlands (2015.06)

ITA (Institute of Technical Acoustics), RWTH Aachen University, Germany (2015.06)

CSTB (Centre Scientifique et Technique du Bâtiment), Champs-sur-Marne, Paris, France (2011.04)

SAKUMA LAB, University of Tokyo, Japan (2010.2)

CSTB (Centre Scientifique et Technique du Bâtiment), Grenoble, France (2009.10)

IRCAM (Institute for Research and Coordination in Acoustics/Music), Paris, France (2008.06)

AIST (National Institute of Advanced Industrial Science and Technology), Tsukuba, Japan (2008.02)

GBRC (General Building Research Corporation of Japan), Osaka, Japan (2006.01)