With the rapid development of science and technology, "smart products" and all aspects of people's lives are involved. Noise-canceling headphones as the leader of headphone products, never expected in the "noise reduction" of this overturned car, really lifted the stone to drop their feet.
On January 13, according to CCTV reports, nearly 50% of the noise reduction headphones are insufficient, the quality test is unqualified, and according to the Ministry of Industry and Information Technology's testing and evaluation of the headphones, only the Wanderer NeoBuds Pro and the small active noise reduction smart headphones Pro two noise reduction headphones have obtained A-level certification, how many people have paid the IQ tax for unqualified noise-canceling headphones?
▼
For headphones, most people's requirements are to be able to simply listen to songs, watch a TV, make a phone call or something, there are not so many requirements for the brand and quality of headphones, but many people often ignore a problem, that is, "how much harm is caused by headphones", really when you realize this problem, your hearing may have been damaged.
As early as the beginning of November 2021, in order to promote the standardization of related fields in the artificial intelligence industry and help the healthy development of the smart noise reduction headset industry market, the National Information Security Research and Development Center issued a notice on the evaluation of smart noise reduction headphone products, but the final test results were unexpected, and only 2 of the test products obtained A-level certification.
The National Information Security Research and Development Center issued a notice on the evaluation of smart noise-canceling headphone products
Noise-canceling headphones are the best in headphone products, and the purpose of developing such products is to reduce noise and reduce the impact on hearing. Noise-canceling headphones are generally divided into 2 types: active noise reduction and passive noise reduction.
Active noise reduction is to create a noise reduction system, through the system to produce the same as the external noise of the reverse sound wave, the noise is neutralized, so as to achieve the purpose of reducing noise.
Passive noise reduction is to create a closed space that can surround the ear or to block out external noise with silicone earbuds and the like. From an intelligent point of view, active noise-canceling headphones have more technical content, but the purpose of these two headphones is to reduce the impact on human hearing.
Active noise-cancelling headphones work
At present, the Ministry of Industry and Information Technology has announced that the two headphones that meet the A-level certification are intelligent noise-canceling headphones. The Wanderer headphones use a composite diaphragm dynamic coil plus Lou's moving iron to form a unique cavity structure, and the noise reduction has reached 42dB. The small headphones use dual active noise reduction technology to reduce noise to a depth of 40dB. The difference between the two is not obvious from the degree of noise reduction. There are many brands of headphones, such as Xiaomi, Sony, Apple, Huawei and so on.
However, CCTV reports said that nearly 50% of the noise reduction headphones are insufficient, there is a phenomenon of unqualified, and there is no public list of specific products. But the Wanderer NeoBuds Pro, Small Active Noise Reduction Smart Headphones Pro two noise reduction headphones have obtained national A-level certification, I did not promote this, but stated the facts.
If you want to protect your hearing, you can refer to the authoritative evaluation results of the Ministry of Industry and Information Technology.
The effect that qualified noise-cancelling headphones can achieve
Usually commuting to and from work on the subway to listen to songs, watch movies, or at home to play games, sports and fitness, wearing headphones this matter everyone is accustomed to, if you often wear unqualified headphone products, what harm will be brought to the ears?
First, NIHL (Noise-Based Hearing Loss Injury). The sound waves generated by the headphones reach our ears and cause the eardrums to vibrate. This vibration travels through the small bones to the inner ear and reaches the cochlea, which is a fluid-filled chamber in the inner ear that consists of thousands of small "hairs." When this vibration reaches the cochlea, the liquid vibrates, causing the hair to move as well. The louder the sound, the stronger the vibration, the more the hair moves.
When the headphones are too loud or when the headphones are worn for a long time, these fragile ear cells will be irreversible damage.
The ear works
Second, physical discomfort (tinnitus, dizziness, etc.). Under normal circumstances, the air pressure in our ears and the outside air pressure are the same, when you wear unqualified headphones or use headphones for a long time, it will lead to imbalance of air pressure in the ear, and you will feel nausea, tinnitus and other symptoms after a long time.
Third, bacterial infections of the ear canal. Since the headphones are placed directly into the ear canal, they can block the air passage, increasing the chance of ear infections. Frequent and long-term use of headphones can also increase the growth of bacteria. These bacteria remain on the headphones and can infect the ears as the number of uses increases. When headphones are shared, the same bacteria in one person's ear can be transferred to another person, making that person also vulnerable to serious ear infections.
Headphones are also personal belongings and need to be hygienic
So how should we use noise-canceling headphones scientifically? First of all, choose products that meet national standards, followed by the need to control the volume and time of headphone use, generally wear half an hour on the recommendation to let the ears rest, and finally to keep the headphones clean, headphones such as close products, try to use alcohol cotton before each use to wipe disinfection.
This article is original by the blue horseshoe crab, restore everyone's attention!
——END——