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Quiet hissing sound when using noise cancellation on my Philips headphones

Updated on 2017-08-24

A quiet hissing sound (called ?noise floor?) can be caused by the amplifier in the noise cancellation headphones. This is normal and not a malfunction. When there are no other sounds, you might hear this hissing sound. When you are playing music, you will not be able to hear it.

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