Bluetooth headset factory price manufacturers elaborate on the advantages of ANC active noise reduction headsets.
The longer I live in the city, the more I feel that it is a very luxurious thing to enjoy a moment of tranquility. ANC active noise canceling is a noise canceling technology, which is one of the methods used in earphones to reduce noise. The active noise canceling function is to generate a reverse sound wave equal to the external noise through the noise reduction system to neutralize the noise, thereby achieving the effect of noise canceling. The reconstruction of a residential building less than 100 meters away from my dormitory has recently started. It is punctual at 7 o'clock every day; suddenly, even if you wear sponge earplugs, you can’t help the sound of the piercing mechanical collision. Thinking of the construction site not long ago, I couldn't help feeling irritated. Shortly after Double Eleven, a terrible idea came to mind: I probably need an ANC active noise canceling headset.
The meaning of noise canceling in acoustics and photography is different, and the noise canceling we are talking about here is to reduce the noise (decibel (dB)) to an intensity that is not detectable by the human ear. The principle of active noise reduction is that all sounds are composed of a certain frequency spectrum. If a sound can be found, its frequency spectrum is exactly the same as the noise to be eliminated, but the phase is just opposite to completely cancel the noise. The noise-canceling headset, naturally, are devices that can eliminate environmental noise and provide users with a quiet environment for listening to music. There are many noise-cancelling headset on the market, including passive noise-cancelling headphones and active noise-cancelling headset. The protagonist of this article is the latter. However, this article is not to recommend specific models of active noise reduction headphones, but to give everyone a practical and fashionable active noise canceling headset.
What's so good about noise canceling headset?
Noise canceling technology used in headset, the biggest advantage (explanation: can overwhelm the opponent's favorable situation) is to protect the user's hearing. Active noise canceling headsets use high-performance Φ13 acoustic drive unit, and leading multi-layer polymer crystal conforming material diaphragm, which can fully express more vigorous bass, brighter and wider treble effect, and greatly reduce Acoustic distortion is eliminated, and high-fidelity sound effects are achieved. Although the protagonist of this article is active noise canceling headset, in fact, even passive noise canceling headset can play a role in protecting hearing. Yes, you heard that right, noise reduction technology can protect your hearing. Many people have a misunderstanding about earphones, that is, listening to more headset will damage their hearing. In fact, what really affects the user's hearing is that the volume is set too high while listening to music.
Imagine if you want to listen to music on a noisy bus or subway car, and the sound insulation of the earphones is not very good, what can you do to hear the content clearly? Of course, turn up the volume. In fact, many people use high volume to cover up the ambient sound. Every time on a noisy bus, I hear the sound of singing from the headset of the passengers next to me. I want to say to that buddy: If you continue like this, your ears will suffer. Irreversible hearing loss. Therefore, in order to listen to music at normal volume, the best way is to isolate the noise from our ears through the noise canceling function. If the volume is normal, listening to music with headset will not bring much burden to the ears.
Active noise canceling
Active noise canceling is just the opposite. It has nothing to do with high-frequency noise, but mid- and low-frequency noise canceling is indeed strong. Active noise canceling headset use high-performance Φ13 acoustic drive unit, and leading multi-layer polymer crystal conforming material diaphragm, which can fully express more vigorous bass, brighter and wider treble effect, and greatly reduce Acoustic distortion is eliminated, and high-fidelity sound effects are achieved. Compared with simple and crude passive noise reduction, active noise canceling technology is a lot of black technology. It uses the phenomenon of sound wave interference to actively emit anti-phase sound waves with the same amplitude as the external noise, so that the two cancel each other to achieve reduction. The effect of noise.
Tips: Test method for sound insulation of headset. Active noise canceling headset use high-performance Φ13 acoustic drive unit, and leading multi-layer polymer crystal conforming material diaphragm, which can fully express more vigorous bass, brighter and wider treble effect, and greatly reduce Acoustic distortion is eliminated, and high-fidelity sound effects are achieved. You can listen to your usual headset at the volume you think is appropriate in the middle of the night, and note the volume. Then, when you use it in a noisy environment like a bus or subway another day, you can hear clearly if you don’t need to increase the volume. Music content, the soundproofing of your headset is ideal. If you need to increase the volume to hear clearly, it is still recommended to replace headphones with better sound insulation, or simply buy an active noise-cancelling headset.
Active noise canceling ≠ sound insulation and passive noise canceling
As mentioned earlier, noise canceling can be divided into passive and active. Passive noise reduction is actually sound insulation. Passive noise canceling earbuds use slow rebound sponge or silicone earmuffs to isolate external noise, forming a closed space in the ear canal. Passive noise-canceling headphones are common in professional monitor headphones. These headphones not only have good sound insulation performance, but are also very comfortable to wear. Of course, the playback sound quality is also very good. However, passive noise canceling can only reduce environmental noise, but cannot eliminate them. And passive noise reduction is more effective in isolating high-frequency noise, but mid- and low-frequency noise is a bit unstoppable.
The specific method is that the microphone collects the environmental noise, and then the noise reduction system analyzes and calculates the noise, and finally the loudspeaker generates anti-phase sound waves to eliminate the environmental noise. Active noise reduction may produce unnecessary noise in a quiet environment, but it does not matter if noise reduction technology is not needed at this time. However, wearing noise-canceling headset will make users inaudible to outside sounds, which is prone to danger, so try not to use noise-canceling headset on the road.
Active noise canceling technology was first applied in the military field, such as noise canceling headset worn by pilots, which are divided into three designs: feedforward noise canceling, feedback noise canceling, feedforward and feedback combined.
Feedforward and feedback noise canceling
Feedforward noise canceling is to design the microphone outside the headset away from the speaker, while feedback noise canceling is to design the microphone near the speaker. Feedforward noise reduction is easier to achieve, while feedback noise reduction can collect noise (decibel (dB)) information that is closer to what the human ear hears, but the microphone may be affected by the sound of the speaker, which requires higher algorithms . At present, most high-end noise-canceling headphones have a combination of passive noise canceling, feedforward and feedback noise canceling designs, which have a very good effect on noise shielding and elimination.
ANC Active Noise Cancelling headset: A Pleasant Machine
In recent years, noise-cancelling headset have become more and more popular. In fact, the experience of noise-cancelling headphones is getting better and better. The sound quality is not necessarily the same as before. It also has the benefits of hearing protection. It has won the favor of many consumers.
But in the end, we must remind everyone not to listen to music when crossing the road and pay attention to traffic safety.