For a group of scholars, scientists and musicians, Hagia Sophia’s rededication as a Muslim place of worship threatens to cloak a less tangible treasure: its sound. Bissera Pentcheva, an art historian at Stanford University and an expert in the burgeoning field of acoustic archaeology, has spent the past decade studying the building’s extravagantly reverberant acoustics to reconstruct the sonic world of Byzantine cathedral music. – The New York Times