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Passive noise cancellation is a type of noise reduction technology that uses physical barriers to block out external sounds. This can include materials such as foam or rubber that are placed around the ear cups of headphones or earbuds to create a seal around the ear and prevent outside noise from entering.
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Active noise cancellation is a type of noise reduction technology that uses electronic circuitry to cancel out external sounds. This is done by using microphones to pick up external sounds and then generating an opposite sound wave that cancels out the original sound.
This can be particularly useful in environments with a lot of background noise, such as on an airplane or in a busy office.
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