A little bit about headphones
1.Types of earphones Earphones are classified according to their energy conversion modes, including moving coil mode, electrostatic type and equal magnetic type. From the structure of separate ways, semi - open and closed. From the form of wearing ear plug type, hanging ear type and headband type.
2. Differences between open and closed earphones The shell of open earphones is open, and the open earphones have light weight, natural sound and no sense of pressure. Because it's open, sound leaks out, and outside noise comes in.
3. What are hi-fi headphones?
The main performance of the iec581-10 standard high-fidelity earphone is: the frequency of sound is not less than 50Hz to 12500Hz; The allowable error of typical frequency response is ±3dB; The slope of the frequency response curve shall not exceed 9dB without octaver. The difference between the average sound pressure level of the unit in the same octaver bandwidth between 250HZ-800Hz shall not exceed 2dB.
4. What is the frequency response range of earphones?
Frequency response range refers to the width of the frequency band that the earphone can broadcast. Excellent earphone frequency response width can reach 5HZ-4000Hz, while the hearing range of human ear is only 20Hz-2000Hz. It is important to note that the criteria for defining the frequency response width are different, such as taking less than 1/2 of the average output amplitude as the criterion or less than 1/4 as the criterion, which is obviously different.
5. What is the impedance of headphones?
The headphone's impedance is short for its AC impedance, and its size is the coil's DIRECT current impedance above 200 ω, which is in order to have a professional headphone jack match. In the desktop or power amplifier, VCD, DVD TV and other headphone jack output machine, the general use of high impedance headphones is more appropriate.
6. What is harmonic distortion of earphones?
Harmonic distortion is a form of waveform distortion, as indicated in the headphone specifications. The smaller the distortion, the better the sound.
