Do noise-cancelling headphones use spatial or temporal interference?

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Homework Statement



Do noise-cancelling headphones use spatial or temporal interference?

Homework Equations





The Attempt at a Solution



They use spatial interference, right? Temporal interference would cause beats which is not noise-cancelling.
 
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InvalidID said:

Homework Statement



Do noise-cancelling headphones use spatial or temporal interference?

Homework Equations





The Attempt at a Solution



They use spatial interference, right? Temporal interference would cause beats which is not noise-cancelling.

Could you please provide definitions for those two kinds of interference? And maybe give some examples of where they occur? They are equivalent in some situations, and you need to think about how headphones modify the sound sensing environment...