This paper addresses the problem of sound disturbance in open office environments. We have in a design-based research study explored how digital, real time generated sound can be added to a work environment and how these sound environments are perceived by respondents when performing work tasks. In this first explorative study we have chosen to focus on designing a digital sound system for activity-based offices, where the physical environment is already designed for particular activities. Our approach is to explore if adding appropriate acoustic designs to the ambient environment can enhance workplaces. Our results show that test subjects perceived that acoustic design could enhance the ambient environments if the acoustic design is pertinent with the environment as a whole.