Do noise-cancelling headphones use spatial or temporal interference?

AI Thread Summary
Noise-cancelling headphones primarily utilize spatial interference rather than temporal interference. Spatial interference involves the cancellation of sound waves through phase differences, while temporal interference can create beats, which is not conducive to noise cancellation. The discussion highlights the need for clarity on the definitions of both types of interference and their applications. Understanding how headphones alter the sound environment is crucial for grasping their noise-cancelling functionality. Overall, spatial interference is the key mechanism behind effective noise cancellation in headphones.
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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...
 
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