Many friends before buying headphones, many of them will look for relevant information such as headset parameter indicators, but in the face of numerous headset parameters, everyone will inevitably feel confused, such as resistance, frequency, sensitivity, etc. What are the meanings of these headset parameters? Well? I believe few people know, today we will take the headset PX200 as an example to explain the specific meaning of the various parameters of the headset.
The principle of the earphone parameter meaning: the earphone is divided into two categories: dynamic and electrostatic earphones according to the principle of energy conversion. At present, most (about 99%) earphones are dynamic earphones, and their working principles are similar. In ordinary sound boxes, a coil in a permanent magnetic field is connected to the diaphragm, and the coil drives the diaphragm to produce sound under the drive of a signal current. The diaphragm of an electrostatic earphone is in a changing electric field. The diaphragm is extremely thin and fine to a few micrometers. The coil drives the diaphragm to make sound under the drive of the electric field force. Electrostatic headphones are mainly used for professional use at the monitor level, and have no meaning for MP3 players.
Cables for the meaning of earphone parameters: At present, most earphone cables are made of copper. The higher the purity, the better the conductivity and the smaller the signal distortion. Common wires include TPC (electrolytic copper): the purity is 99.5%; OFC( Oxygen-free copper): the purity is 99.995%; C-OFC (linear crystalline oxygen-free copper or crystalline oxygen-free copper): the purity is above 99.995%; OCC (single crystal oxygen-free copper): the purity is higher, above 99.996%.
The frequency response range of the meaning of the earphone parameters: frequency response refers to when an audio signal output at a constant voltage is connected to the system, the sound pressure generated by the speaker increases or attenuates with the change of frequency, and the phase changes with the frequency. Phenomenon, this sound pressure, phase and frequency change relationship is called frequency response. Within the rated frequency range, the ratio of the larger value to the smaller value of the output voltage amplitude is expressed in decibels (dB). In layman’s terms, it is the width of the frequency band that the earphone can send. The hearing range of the human ear is generally around 20Hz-20000Hz.