Noise-canceling headphones generally do not produce damage to the ear, it is the use of some method to reduce noise, divided into active noise-canceling headphones, passive noise-canceling headphones two categories. However, attention should be paid to the control of the volume and duration of use. 1. Active noise-canceling headphones: the headset is through the noise-canceling system, which produces the same with the outside noise of the reverse acoustic wave, to play the role of neutralizing the noise, so as to achieve the purpose of noise reduction, so generally will not damage the ear. 2. Passive noise-canceling headphones: passive noise-canceling headphones can surround the ear to form a closed space, part of the use of sound insulation materials such as silicone materials, such as earplugs, can block the external noise. Can not be a long time to continue to use headphones, because a long time to block the airflow in the ear canal, but also cause damage, damage to the ear canal, resulting in otitis externa may be. It is recommended to avoid going to noisy environments in normal times, and to seek medical attention if discomfort in the ear is caused by loud noise.