Riikka Helenius

Perceived acoustic environment, work performance and well-being - survey results from Finnish offices

Esko Keskinen, Annu Haapakangas, Riikka Helenius, 2008 .

ACOUSTICS IN OPEN-PLAN OFFICES - A LABORATORY STUDY

Jukka Keränen, Riikka Helenius, Valtteri Hongisto, 2004 .

Speech privacy between neighboring workstations in an open office : A Laboratory Study

Jukka Keränen, Riikka Helenius, Petra Virjonen, 2007 .

Refurbishment of an open-plan office – Environmental and job satisfaction

Hannu Koskela, Annu Haapakangas, Riikka Helenius, 2016 .