Noise-canceling headsets are a kind of headsets that reduce noise through a certain method.
Noise-canceling headsets work by using a combination of microphones and electronic circuitry to actively cancel out external noise. The microphones on the headset pick up the external noise and send it to the electronic circuitry, which then creates an opposite sound wave to cancel out the external noise. This process is known as destructive interference, where the two sound waves cancel each other out. The result is that the external noise is significantly reduced, allowing the user to hear their audio content more clearly. Additionally, some noise-canceling headsets also have passive noise isolation, which physically blocks out external noise through the use of sound-absorbing materials in the ear cups.
The current noise-cancelling headsets with mic are divided into two noise-cancelling modes: passive noise cancelling and active noise cancelling.
Passive noise reduction is a technique that reduces noise in the environment through the use of specific materials or devices. Unlike active noise reduction, passive noise reduction does not require the use of electronic devices or sensors to detect and combat noise. In contrast, passive noise reduction relies on the physical properties of the material to absorb, reflect or isolate the noise, thereby reducing the propagation and impact of the noise.
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.
The prerequisite principle of active noise cancelling is the interference principle of waves, which neutralizes the noise through positive and negative sound waves, so as to achieve the noise-cancelling effect. When two wave crests or wave troughs meet, the displacements of the two waves will be superimposed on each other, and the vibration amplitude will also be added. When in the peak and valley, the vibration amplitude of the superposition state will be cancelled. ADDASOUND wired noise cancelling headset has applied the active noise cancelling technology.
On an active noise cancelling headset or active noise cancelling earphone, there must be a hole or part of it facing the opposite direction of the ear. Some people will wonder what it is for. This part is used to collect external sounds. After the external noise is collected, the processor in the earphone will create an anti-noise source in the opposite direction to the noise.
Finally, the anti-noise source and the sound played in the earphone are transmitted together, so that we can't hear the outside sound. It is called active noise cancelling because it can be artificially determined whether to calculate the anti-noise source.
Post time: Sep-06-2024
