How active noise cancellation works in headphones

Modern technologies have made it possible to develop a system thanks to which external noise is completely blocked when listening to music on headphones. This is important, first of all, for the safety of using headphones, and the second important aspect is improving quality. Let's try to figure out how the system works.

Noise reduction in headphones

Today, manufacturers provide almost every similar accessory with this advantage. However, when purchasing, it is advisable to know the principle of performance, as well as possible negative consequences. Indeed, with the help of the presented insulation, it is impossible to prevent all external sounds, but it fulfills its purpose quite well. Below we will look at why this is so.

What is it used for, what is useful

It is recommended that you first understand the definition. First of all, this is an option to eliminate interfering noise by superimposing a specific sound that is initially generated. Thus, the user of this device can play audio files and video recordings, while unwanted noises (a passing car, street sounds, outside conversation, and so on) will not interfere with the activity. It is especially convenient to use when visiting a crowded place, the metro.

ATTENTION! If you choose a high-quality model of equipment, then when using it you can feel like you are in a completely empty room, even if you are in a noisy space at that moment.

In addition, some developers provide the opportunity for users to use the built-in amplifier in suppression. This means that with the functionality of the system, the result can be the highest quality sound.

How it works

All activities are based solely on the laws of physics. Sound waves are simply reflected and absorbed. That is, the system captures the noise and creates a similar connection with the same amplitude, but with the opposite phase. Thus, the two components are mixed, due to which each other is suppressed. Moreover, the entire procedure is carried out thanks to external microphones that are built inside. They are needed to measure the degree of surround sound. Accordingly, with the help of this mechanism you can protect yourself from excessive volume. But the popularity of such a system did not increase immediately. Initially it was used only in the aviation and defense industries.

IMPORTANT! With long-term continuous use, you can notice negative consequences. To understand them in more detail, it is worth paying attention to the following aspects.

• The most common complaint from users is headaches. This occurs due to the constant pressure of sound waves on the eardrums. Therefore, some people may have an intolerance to active suppression.
• The feeling of nausea is created due to the effect on the vestibular apparatus.When using it, you yourself are deceiving your own brain: when walking, the body understands that it is in a state of movement. However, the hearing organs convey the opposite situation to the brain.
• When used, headphones suppress the most low frequencies, bass. Along with external sound, certain low frequencies in the music being played can also be isolated.