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"You know five, six years ago, with cell phones, we were simply worried about conversations going on when kids should be listening in class, phones ringing and disturbing the teacher while they were trying to teach, but we weren't worried about pictures, we weren't worried about text messages, " he says.

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It was like listening in on a college literature class where nobody had actually read the book.

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It would be rude to be speaking to someone face-to-face then answer a phone call, but I can be talking to someone, or even sitting listening to a professor in a class, and also quickly answer a text message at the same time.

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The sound is reproduced either by the sound system of the S-Class or by Sennheiser Noise Gard headphones, which filter out any unwanted ambient noise for unparalleled listening pleasure.

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