In another corner of I.M. Pei’s library, Deborah Garcia of MIT introduces Responder, a structure that produces a 15-minute "sigh" each day at sundown. The audio that plays from its speakers is a compilation of various moments captured throughout the library, from the grumblings of the steel structure to the murmur of ventilation. It aims to give a voice to an iconic piece of architecture, enabling the conversation between community members and their surroundings.