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    how the principle of superposition is used to reduce the engine noise heard by a fighter pilot?
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    (Original post by reb0xx)
    how the principle of superposition is used to reduce the engine noise heard by a fighter pilot?
    The waves in the headphones need to be out of phase to the waves that are making the noise i.e the engine noise.
    If you have waves being emitted by a headphone the fighter pilot is wearing, or inside the plane that WILL destructively superpose, it will cancel out a proportion of the waves - and the ammount of noise heard by the fighter pilot.
    If it is in phase, it will make it louder, so you need it to be OUT of phase
 
 
 
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