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This project uses ultrasonic transreducers and speakers to create an audio player that can only be heard from a certain direction and distance. What I liked about it is the fact that the sound is always present in the environment, just like photos on the wall are always there. One thing that surfaced from the research is that the visual presence and the everyday encounter of physical mementos is one of the reasons people feel physical mementos are perceived initially as more valuable. But in fact, digital mementos are equally valuable as people start to think about all the memories embedded in the digital mementos.

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