We installed scents that can be experienced on the sidewalk in front of our apartment. It is based on beliefs during the plague that strong smells and vapors would keep the disease away. The recommended smells were cinnamon, clove, orange and vinegar. It was common that people would saturate their window frames and doorways with these scents.
We installed ten metronomes set to 60 bpm in a row of trees on the sidewalk near our apartment. It created a promenade of syncopated tic toc sound as passersby strolled, ran and cycled past.