Let's take a look at the most common earphone products that people listen to now. Here we divide the earbuds into in-ear and non-ear-ear styles. This classification is also the most acceptable and simplest way to classify earphone enthusiasts. What do friends need to pay attention to when purchasing such earplugs, or who are these earplugs suitable for?
The earphone products are described in English as "In-Ear". Friends can understand it as the ear, which means that the earplug products are the listening products that need to be placed in the ear canal, but because of the different habits of the enthusiasts. For the change of sound experience, we gradually divide the earplugs into two types: in-ear and non-ear-type. However, many people think that the in-ear and in-ear earphones are divided according to the way the earplugs are worn. Here we It is not a special approval, it is to put the earplugs into the ears, but the depth and form of the stuffing are different!
In-ear earphones are better for listening to the eardrum because of the sounding diaphragm, but the earplugs need to be inserted deeper into the ear canal and exert a certain pressure on the ear, so Many users don't feel particularly comfortable when they wear it, which is one of the reasons why many people don't like these earplugs now.
In-ear earphones have shorter distances into the ear canal than in-ear earplugs, and many non-in-ear earphones fit nicely into our cochlea when worn, so they are easier to wear than in-ear earphones. It is more comfortable, but because of the long distance from the eardrum in the ear canal, the sensitivity of the earbuds and the performance of the sound are higher when listening. Now there are many non-in-ear earphones on the market that are sound and inspiration. There are no in-ear earplugs on the top, which is one of the more important reasons.
In fact, whether it is an in-ear earphone or a non-ear earplug, long-term listening will cause some damage to our eardrum, which is why many users who like to use earbuds to listen to music for a long time are getting louder and louder. The reason, because earphones listening to music is detrimental to hearing, so long-term listening must not use earplugs. And no matter what kind of earplugs, when wearing, it will cause friction with our clothes, people have a stethoscope feeling, and earplugs This shortcoming has not been a good solution yet, so friends must pay attention when choosing earplugs.
Office Projector
Screen Resolution
There are generally three screen resolutions for office projectors:
One is a 4:3 screen suitable for office PPT playback. The first is the SVGA machine with the lowest price and the highest cost performance. This kind of machine is generally priced at around 2500 and has powerful performance. The disadvantage is that the resolution is 800X600, which is relatively low. The second is the XGA machine, which is an upgraded version of the SVGA machine with a resolution of 1024X768.
The other is the 16:10 aspect ratio screen used by some foreign-funded enterprises, which is the 1280X800 resolution of WXGA. However, with the transparent price of 1080p projectors, more and more companies will choose full HD 1080p projectors as their office projection solutions.
Office Projector Features
According to the needs of different office environments, office projectors are roughly divided into three categories.
One is a conventional projector that is placed or hoisted in the conference room, the second is a Portable Projector that can be carried around, and the third is an ultra-short-throw projector that is convenient for work reports and speeches.
Wireless Office Projector
With the advent of the Internet era, the emergence of a series of wireless office series has added new members to the office projectors. The wireless office projector is realized by the built-in wireless module of the ordinary office projector. Wireless office makes people do not need to switch signal lines frequently in office meetings, allowing people to have a better experience in meetings!
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