How to buy earphones

For the initial understanding of the plug-in headset, the steps of "watching, listening, and recognizing" can be used to identify: firstly view the technology and parameters, secondly listen to the sound quality, and thirdly recognize the brand.


 look at the process and parameters

At first glance, the craftsmanship is to judge the quality of the headset from the first appearance of the headset, whether the manufacturing process is accurate, fake and inferior products generally do not pay attention to these details, so you can judge correctly with a little care.headphones with memory card The technical parameters of the card headset are nothing more than frequency range, output power, and signal-to-noise ratio.

The output power is a reference indicator of the card earphone. It is expressed in watts. This indicator does not indicate the quality of the earphone. It only indicates that to drive the power amplifier required by the card speaker, the battery needs to have the required output power.

The signal-to-noise ratio refers to the ratio of the output signal voltage of the amplifier to the noise voltage output at the same time. It is often expressed in decibels. The higher the signal-to-noise ratio of the device, the less noise it produces. Generally speaking, the larger the signal-to-noise ratio, the smaller the noise mixed in the signal and the higher the sound quality of the sound playback, otherwise the opposite is true. The signal-to-noise ratio should generally not be lower than 70dB, and the minimum signal-to-noise ratio marked by the card headset is mostly between 70dB and 90dB.


Second listen to sound quality

This is mainly to listen to the heavy bass effect.


Three recognition brands

Good card earphones have well-made brand marks. If the trademark does not have a registered mark, there is no anti-counterfeiting certification mark on the outer packaging, and there is no warranty card inside the packaging, most of these three-in-one products are suspected of counterfeiting or inferiority.


like：

What is a card headset

Can headphones store songs?





Comments

Post a Comment

Popular posts from this blog

Is there a difference between a CNC lathe and a CNC milling machine?

1. The working principle is different. The CNC lathe is the rotation of the workpiece, and the CNC milling machine is the rotation of the tool. Lathe refers to a machine tool that mainly uses a turning tool to turn a rotating workpiece. Generally, the turning tool is fixed at a certain position on the machine tool, and the workpiece rotates along the axis under the clamping of the fixture, and is cut when it is close to the knife edge, so it is mainly suitable for processing shafts, discs, sleeves and other workpieces with rotating surfaces. cnc turning service . It is the most widely used type of machine tool in machinery manufacturing and repair factories. Rotating machines such as milling machines and drilling machines are all derived from lathes. 2. Different programming methods. Determined by the working mode, the programming of the CNC lathe only needs to input two coordinates, the milling machine needs to input 3 coordinates, the lathe xy2 axis, most of the circular shaf
Read more

What is the difference between inkjet and laser printers

The first is the issue of paper compatibility. Generally, inkjet printers can be compatible with many types of paper, including but not limited to: printing paper, envelopes, photo paper, CD cover paper, etc. You can use anything you want, even high-end ones. All of them can be printed directly on some physical objects. However, because the consumables of laser printers are mainly toner, they are basically only suitable for ordinary paper, because if you change to special paper (photo) with low surface friction and adhesion, the toner may not hang, and it may fall off. Relatively narrow. The second is the issue of clarity. Inkjet printers are much stronger than laser printers. The printing resolution of the laser printer is too low, and the printed pattern has very serious dot matrix features (similar to the dot matrix with low-end tempered film attached to the mobile phone). blue film inkjet printer If you look closely, you can see each pixel; here Inkjet printers are very advanta
Read more

About the display

  Fluid crystal material (LCD), a type of exhibit employed in computerized products and mobile pcs. Arranged, each bead cannot catch them. Therefore, the crystals are like leaf blinds, which can diffuse and block the shot. lcd display manufacturers , specializing in the development and production of LCD monitors. High-quality products, low power consumption, fast delivery, and reasonable price. Liquefied Crystal Display (LCD) At present, medical and engineering information products are establishing towards the objective of becoming light, thin, simple and small. Obviously, display products using a extended record in pc peripheral units are no numerous. With ease of having and dealing with as being the precondition, classic exhibit approaches for example CRT video clip tubing displays and Brought exhibit solar panels are at the mercy of variables such as excessive volume or big energy usage, and cannot meet the true demands of users. The development of liquid crystal display technology
Read more