What are the differences between the $30 dollar and the $100 noise cancelling ea!

Question:

What are the differences between the $30 dollar and the $100 noise cancelling earphones?

Seriously... do they have something in them? Why are some more expensive?

Additional Details

4 weeks ago
I mean do they cancel noise out equally?

Answers:

I bought Sony NC earphones ($79.99 + tax) and honestly I think its the bass. You'll notice that some earphones sound like rattling opposed to a boom LOL if that makes sense.

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What are the differences between the $30 dollar and the $100 noise cancelling ea!

What are the differences between the $30 dollar and the $100 noise cancelling earphones?

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