Modern technologies have allowed developing such a system, due to which external noise is completely blocked when listening to music in headphones. This is important, first of all, for the safety of using headphones and the second important aspect - quality improvement. How the system works try to figure it out.
Headphone Noise Reduction
To date, manufacturers supply almost every such accessory called advantage. However, when acquiring it is desirable to know the principle of the implementation of health, as well as possible negative consequences. Indeed, with the help of the presented isolation all external sounds cannot be prevented, but it fulfills its purpose quite regularly. Below we analyze why.
What is it useful for?
Pre-recommended to deal with the definition. First of all, this is the option to eliminate interfering noise by superimposing a certain sound that is initially generated. Thus, the user of this device can play audio files and video recordings, while unwanted rustles (passing cars, street sounds, other people's conversations, etc.) will not interfere with the activity. Especially convenient to use when visiting a crowded place, the subway.
ATTENTION! If you choose a high-quality model of equipment, then with its application it is possible to feel yourself in a completely empty room, even if you are in a noisy space at this moment.
In addition, some developers allow users to use the built-in amplifier in suppression. And this means that with the functionality of the system as a result, the best sound quality can be formed.
How it works
All activity is based solely on the laws of physics. Sound waves are simply reflected and absorbed. That is, the system captures noise and creates a similar connection with the same amplitude, but already with the opposite phase. Thus, the two components are mixed, due to which the suppression of each other takes place. And the whole procedure is done thanks to external microphones, which are built from the 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 grew not immediately. It was originally used only in the aviation and defense industry.
IMPORTANT! With prolonged continuous operation, you can notice the negative effects. To understand them in more detail, you should pay attention to the following aspects.
- The most common complaint from users is a headache. This is due to the constant pressure of sound waves on the eardrums. Therefore, some people may have intolerance to active suppression.
- The feeling of nausea is created due to the impact on the vestibular apparatus. During exploitation, you yourself are deceiving your own brain: when walking, the body understands that it is in a state of movement. However, the organs of hearing transmit the opposite situation to the brain.
- In use, headphones suppress most of all low frequencies, bass. Together with the external sound can be isolated and certain bottoms in the music being played.
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