Noise-canceling techniques are methods used to reduce unwanted ambient sounds. One common approach is active noise cancellation, which involves using microphones to pick up external noise and then generating sound waves that are the exact opposite, effectively canceling out the noise. This technology is often found in headphones and earbuds. Another technique is passive noise isolation, which relies on physical barriers to block sound. This can be achieved through the use of thick materials or specially designed shapes that fit snugly in or over the ears. Both methods aim to create a quieter environment for the user, enhancing focus and comfort.