This paper reports the main findings of an in situ study involving the design and evaluation of a sound installation in a public square in Montreal exposed to construction noise. questionnaires were administered to public space users in July and August. We compare the responses collected in the presence or absence of the installation to investigate its effect on soundscape evaluations. The results show that the presence of the sound improved the sound-scape of the public square, particularly when the public square was exposed to construction noise.