Supplementary Material for "Infodrops: Sonification for enhanced awareness of resource consumption in the shower"

 Although most of us strive to develop a sustainable and less resource-intensive behavior, this unfortunately is a difficult task, because often we are unaware of relevant information, or our focus of attention lies elsewhere. Based on this observation, we present a new approach for an unobtrusive and affective ambient auditory information display to become and stay aware of water and energy consumption while taking a shower. Using the interaction sound of waterdrops falling onto the bathtub as a carrier for information, our system supports users to be in touch with resource-related variables. We explore the usage of an affective dimension as an additional layer of information and introduce our 4/5-factor approach to adapt the auditory display's output so that it supports a slow but steady adjustment of the personal showering habit over time. We present and discuss several alternative sound and interaction designs.