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From the New York Times:
What do whale songs and wavelets have in common? Quite a bit, and the wavelets have nothing to do with water.
In a Northern California studio, Mark Fischer, an engineer by training, uses wavelets — a technique for processing digital signals — to transform the haunting calls of ocean mammals into movies that visually represent the songs and still images that look like electronic mandalas. (His art can be found at aguasonic.com.)
Mr. Fischer learned about acoustics by developing software for Navy sonar and the telecommunications industry. Years later, a serendipitous brush with whale researchers in Baja California led him to take a closer look at whales and the diversity of their intricate underwater communication. “I don’t think anyone has ever spent even a little time around a whale and not been amazed by it,” Mr. Fischer said in an interview.
Mr. Fischer creates visual art from sound using wavelets. Once relatively obscure, wavelets are being used in applications as diverse as JPEG image compression, high definition television and earthquake research, said Gilbert Strang, a math professor at the Massachusetts Institute of Technology and an expert on wavelets.
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