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Geophysicist Dave Engebretson of Western Washington University in Bellingham has struggled with his eyesight since birth. But when his vision took a serious downturn in 1996 — today he has difficulty recognizing faces up close — Engebretson grasped for the world of sound. He has made a considerable hobby out of audifying scientific data — taking numbers from datasets and setting them to sound frequencies to create seconds-long clips at his home studio.