The scope of this Accessory is not to improve your listening experience by 
offering better Sound Quality while in a quiet environment. It is rather to 
reduce background noise in inherently noisy environments, such as in a plane 
or bus so that you do not have to 'blast' your music player in order to be
able to listen. It will not totally *isolate* the environmental noise.
Even expensive professional level, "closed circumaural" headphones cannot
totally isolate external noise. 
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