But what I never expected was that, according to CCTV reports, nearly 50% of noise-reducing headphones were not enough to reduce noise, that is, they were unqualified. This is a "tragic" scene of noise-reducing headphones. According to the testing and evaluation of headphones by the Ministry of Industry and Information Technology, only two noise-reducing headphones NeoBuds Pro and a small-scale active noise-reducing smart headset Pro have obtained A-level certification.
This is terrible. In most people's minds, they may think that as long as they can listen to music and watch TV, they will not care about quality and brand as long as they can use it. However, many people ignore a problem, that is, "the harm caused by headphones." When they find it harmful, their hearing may have declined.
The noise-reducing earphone mentioned above is actually a type of earphone. The biggest role of noise-reducing headphones is definitely to "reduce the impact on hearing." Unexpectedly, however, in the testing and evaluation of headphones by the Ministry of Industry and Information Technology, only two noise-reducing headphones have obtained A-level certification. I wonder if you are qualified to use them? Let's take a look at what noise canceling headphones are. If used improperly, how harmful are they to hearing?
What are noise canceling headphones? As we also said above, noise-reducing headphones mean to reduce the damage to hearing. There are generally two kinds of noise-reducing headphones-active noise-reducing headphones and passive noise-reducing headphones.
There are some differences between these two kinds of noise-reducing headphones. Active noise reduction headphones neutralize noise by generating reverse sound waves equal to external noise through noise reduction system, so as to achieve the effect of noise reduction. Passive noise reduction headphones mainly form a closed space around the ear, or use sound insulation materials such as silicone earplugs to block external noise.
Conceptually, headphones with active noise reduction may be smarter, but the ultimate goal of both headphones is to reduce "mutual interference" in listening.
According to analysis, the two qualified headphones released this time are also intelligent noise reduction. The rambler earphone adopts a unique cavity structure composed of a composite diaphragm moving coil and a movable iron. The coil iron unit is fully displayed by active electronic frequency-dividing DSP and equipped with hybrid active noise reduction technology, and the noise reduction depth can reach 42dB.
The small earphone adopts dual active noise reduction technology, and the maximum noise reduction depth can reach 40dB, which supports dual microphones to detect environmental and in-ear noise. Therefore, in fact, there is not much difference between the two, and they are both active noise reduction technologies. However, it also shows that passive noise-reducing headphones may have some defects, otherwise mainstream headphones will not adopt the "active noise-reducing headphones" technology.
Of course, there are many brands of full headphones, such as Sennheiser, Beats, Sony, Huawei and so on.
However, CCTV specifically said that nearly 50% of noise-reducing headphones have insufficient noise reduction and are unqualified. Including what is not explained for the time being. However, it is clearly pointed out that both NeoBuds Pro and Pro noise-reducing headphones have obtained A-level certification. We are not here to sell, but the facts.
If you want to protect your hearing, you should choose the authoritative brand of earphone testing and evaluation of the Ministry of Industry and Information Technology.
How harmful are unqualified headphones? Listen to music, watch drama, play games, exercise and keep fit. Wearing headphones has become the norm, but wearing unqualified headphones or wearing unqualified headphones for a long time will definitely have an impact. From a scientific point of view, it may bring at least two major hazards.
First, it directly causes hearing damage. As we all know, when we wear headphones, it covers almost the whole auditory system. The inner ear hair cells located in the cochlea are the main "drivers" of the whole auditory system, which transmit external sounds to the auditory nerve. If you use headphones unreasonably for a long time and use unqualified headphones, it may cause damage to ear hair cells.
According to scientific proof, ear hair cells are limited and belong to "non-regenerative" mode, so if they are in a state of fatigue damage for a long time, they may lead to hearing loss, which may eventually lead to hearing loss.
Second, it causes ear diseases and may eventually lose hearing. Wearing headphones for a long time, the air is not circulating, and unqualified headphones are easy to carry some bacteria. If it is not cleaned in time, bacterial infection may occur in the ear. If the chain effect is caused, eardrum damage and tinnitus may occur, which may eventually lead to hearing loss or hearing loss. This is the general situation.
Therefore, a qualified earphone is very important, and reasonable use is also very important. Many people may see that a few dollars and dozens of dollars can buy an earphone, but what they never expected was that most of the products were not qualified. So be careful when buying.