Headphones have become a must-have for young people, so what do we need to know when buying headphones? Let me introduce you to the necessary knowledge of buying headphones.
Type of earphone
The types of headphones can be divided into different types according to different methods. Firstly, according to the conversion mode, it can be divided into: moving coil type, electrostatic type and equal magnetic type; according to structure: open type, semi-open type and closed type; according to wearing form: head-mounted, over-the-ear type and earplug type.
Frequency response range of headphones
The frequency band that the earphone can emit is the frequency response range, the hearing range of the human ear is 20Hz-20000Hz, and the excellent earphone frequency response width is up to 40,000Hz. With 1/2 below the average output amplitude as the standard or 1/4 as the standard, their criteria for defining the frequency response width are obviously different. The average manufacturer is based on -3dB, and of course some products are based on -10dB. Therefore, different brand headphones test standards may be different.
Headphone impedance
The impedance of the earphone is the abbreviation of its AC impedance. In order to match the earphone jack on the professional machine, its size reaches 200Ω or more of the DC resistance of the coil. On large machines (desktops, VCDs, DVDs, TVs), medium and high impedance headphones are generally used. If you have to use a low-impedance earphone, first turn the volume down to the minimum and plug it in, otherwise it is easy to burn the earphone or the voice coil is distorted and broken into a broken sound. Micro-machines generally use low-impedance headphones, while paying attention to sensitivity. Sensitivity is very important for microcomputers.
Headphone sensitivity
I have already mentioned the importance of the sensitivity of the headphones to the microcomputer. Now let's take a look at the sensitivity of the headphones. The sensitivity of the earphone refers to the amount of power that needs to be input in the case of the same loudness, and the higher the sensitivity, the smaller the power required.