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Noise-canceling headsets are a kind of headsets that reduce noise through a certain method. The current headset cancelling noise   with mic are divided into two noise-cancelling modes: passive noise cancelling and active noise cancelling.   Wired Headset With Passive Noise Cancelling Microphone   Passive noise cancelling is an outdated method of noise cancelling. The reason why passive noise-cancelling is used is that it does not rely on the support of technology, thus reducing costs.   Wrapped to form a closed space: Passive noise-cancelling headsets mainly form a closed space by wrapping the ears and using sound-insulating materials such as silicone earplugs to block external noise. Without the aid of technology, the headset for noisy office can only block high-frequency noise, but can't do anything about low-frequency noise.   Generally, passive noise-cancelling headphones are headsets, and they are huge in size. For those who want to reduce noise in summer, ...