Noise cancellation

Classical Mechanics Level 1

Active noise control (ANC), also known as noise cancellation, or active noise reduction (ANR), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The above diagram illustrates the process of noise cancellation used in noise canceling headphones. Which of the following phenomena can be explained by the same principle as in the above example?

When two water waves meet, they form a wave of greater or lower amplitude. The hills send back an echo. Noise from a construction site propagates farther at night than at daytime. A water pool looks shallower than it actually is.

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Lakshan Dumpa by Lakshan Dumpa , 24, India

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3 solutions

Constructive interference and Destructive interference, right???

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Noise affects our social environment..

Mustafizur Rahman - 7 years, 3 months ago

yes, you're right

Hendra Gusmawan - 6 years, 11 months ago
Ali Boumejd
Mar 12, 2014

interference is a phenomenon in which two waves superpose to form a resultant wave of greater or lower amplitude. Interference usually refers to the interaction of waves that are correlated or coherent with each other, either because they come from the same source or because they have the same or nearly the same frequency.

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Yogesh Waran
Mar 12, 2014

I have no idea

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