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 | Hello, welcome everybody. As you all know, there are millions of inventions that had a big contribution to mankind and today we have a special guest. John C. Koss, the inventor of the stereo headphones. | |
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| Hi everybody! | |
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| So John, what exactly are headphones? | |
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| Well, headphones are a small pair of listening devices that are designed on or around the head over the user's ears. | |
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| mhm... | |
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| Most importantly, we use them, most of the time, to listen to music. | |
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