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Home : 2006 : Sep : 30
You might investigate at Radio Shack or Sharper Image. Maybe on the internet. When I was in graduate school, a prof demonstrated this technology which makes a lot of sense to use--my voice used to get all raspy from loud talking. I never bought a device, but a chorus teacher did as he taught 50 or more kids at a time. He got his at Radio Shack.
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