“I want to use these while riding a bicycle. I want to hear some outside noise such as cars coming up behind me. Do these ear phones block out all sound?”

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• Yea they do block off sound.

  Answered by MehJBL 4 years ago

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• No they don't, as long as your volume is not full then you can still ear what's going on outside.

  Answered by JBL Support 5 years ago

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