The noise reduction methods used by individuals to protect their hearing are generally divided into two kinds: earplugs and earmuffs. Here are the earplugs and earmuffs. Preformed earplugs: Service life: one week to several months Service life: several years (regular inspection) Service life: 1 month to 1 year The LTM series is designed to meet the needs of human-computer interaction in the market. Our engineers have developed 8-inch to 65-inch LCD touch monitors and touch all-in-ones to provide longer life, high picture quality, and a wide temperature range. It can be used for uninterrupted operation in rugged equipment in harsh environments (high and low temperature, humidity, salt spray and rain) and harsh conditions (high shock, high vibration, and fall). Support a variety of signal input interfaces, including VGA and Video, special requirements can increase DVI and HMI interfaces; support DC12V or AC220V power input, special requirements support DC 9 ~ 36V wide voltage input can be wall-mounted, folding / rotating bottom seat Embedded installation, open installation and other diversified installation methods to meet the various needs of customers. Specially designed folding base, adjustable for multiple angles; no shaking when touched; TFT digital true color LCD display mode to meet customer visual effects; hidden adjustment panel to make the frame more smooth and flat; touch screen can flexibly choose serial port, The USB port communicates with the host, using resistive screens, sonic screens, and infrared screens to meet customer environmental needs. desktop display,desktop monitors,desktop monitor touch screen,desktop monitoring,best desktop monitors,desktop computer monitor Shenzhen Hengstar Technology Co., Ltd. , https://www.angeltondal.com
Researchers at the University of Washington and Columbia University in the United States have found that the level of noise generated by urban public transportation is enough to cause hearing impairment in some people, and this damage may be permanent. It is estimated that there are about 30 million people worldwide whose hearing is damaged by noise. The researchers measured the noise level of the New York public transport system and found that in the transportation, the subway reached 80.4 decibels, and the light rail also had 79.4 decibels; the station was noisier, the subway platform reached 102.1 decibels, and the bus station reached 101.6 decibels. The overall situation is: the outside of the car is higher than the inside of the car, the large station is above the small station, and the underground is above the ground.
Researchers at Columbia University believe that on a noisy platform, staying 2 minutes a day is enough to cause some of the waiting passengers to have hearing loss. Researchers from the University of Washington said that long-term exposure to a less noisy environment can cause chronic damage, and if the noise level increases by a little, the risk of damage increases significantly. For example, the risk of 95 decibels is 10 times that of 85 decibels and 75 decibels. 100 times your auditory acuity as long as the drop of 10 decibels, your ability to hear others speak will be greatly reduced.
The United States Environmental Protection Agency and the World Health Organization believe that the average daily noise level should be below 70 decibels, and generally will not affect hearing. If you have to put yourself in a noisy environment for work reasons, you need to take relevant noise reduction measures. Noise reduction measures are generally divided into three types. First, noise reduction from the source, such as car muffler, factory pipeline muffler valve, etc.; second, noise reduction from the noise transmission process, such as sound insulation panels on the highway, sound insulation green belt Etc.; The last one is to work hard in the ear, belonging to the terminal noise reduction, is the last line of defense against noise, the use of the most common, the cheapest. 
Expanded foam earbuds are the most common and economical noise reduction devices available today, and they can be easily and at any time denoised. There is nothing wrong with wearing expansion foam earplugs for noise reduction, but one thing to be reminded is to pay attention to earplug hygiene. Wearing earplugs for a long time has pressure on the skin in the ear. In the past, long-term ear infections have caused itching, redness, and even ulceration.
Service life: one day to one week 
Custom earmuff earplugs are exclusive private noise reduction products. Not only can they be earmoulds that are most suitable for the ear canal, but also noise filters can be placed in special earplug holes. This means that terminal noise reduction has entered the era of intelligence. Different scenarios The noise can be filtered to meet the requirements and standards, which will make the noise reduction experience to an unprecedented height. But the disadvantage is that the cost is relatively high. 
The earplugs are attached to the ends of the frame. These earplugs are rarely used. They are usually used by athletes of special sports or workers of special types of work, such as engine workers and turbine workers working on the bottom of large ships. The purpose of the frame is to prevent the accidental drop of earplugs. The naked ear is suddenly exposed to a strong noise environment. This kind of earplug must be frequently disassembled and replaced. At the same time, these earplugs are also suitable for the external auditory meatus, and the ordinary people cannot use the earplugs. In general, earbud noise reduction products are not recommended for use in an environment with an average noise level of more than 90 decibels. 
Hearing protection earmuffs, also known as capsule earmuffs, are not inserted into the ear canal like earplugs but are like earphone-like devices. This kind of earmuffs is also suitable for people with ear canal abnormalities. In recent years, due to the rapid development of technology products, noise filter devices have also been applied to some of these high-end earmuffs. However, the quality of such products in the market is not the same, often the price difference is very large.
Lifespan: The normal service life is about 1 to 5 years. In summary, the permanent damage of the ear is greater than that of any other place. Start to protect your ears, be responsible for your ears, and be responsible for yourself.
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