Before choosing a good headset, we should know what details should be paid attention to when choosing a headset. Next, the first brand manufacturer of headsets will share with you the precautions for buying headsets from a professional perspective:
1. The classification of earphones:
A. According to the principle of energy conversion: There are mainly two categories of dynamic (Dynamic) and electrostatic (Electrostatic) earphones.
Principle of moving coil earphones: At present, most (about 99%) earphone earplugs are of this type. The principle is similar to ordinary speakers. The coil in the permanent magnetic field is connected to the diaphragm, and the coil drives the diaphragm to sound under the signal current. .
Electrostatic earphones: The diaphragm is in a changing electric field. The diaphragm is extremely thin and accurate to a few microns (currently STAX’s new generation of electrostatic earphone diaphragms are accurate to 1.35 microns). The coil drives the diaphragm to sound under the drive of the electric field.
B. According to the degree of opening: Mainly open, semi-open, closed (closed).
Open style: Open style earphones generally have a natural sense of hearing and are comfortable to wear. HIFI earphones commonly seen at home can leak sound, and vice versa, the outside sound can also be heard. The earphones exert less pressure on the ears.
Semi-open: There are no strict regulations, and the sound can only enter but not exit, or only exit but not enter, and make corresponding adjustments according to needs.
Closed type: The earmuffs put a lot of pressure on the ears to prevent the sound from entering and exiting, and the sound is correctly positioned and clear. This is more common in the professional monitoring field. However, this type of headphones has a disadvantage that the bass is severely stained.
C. Divided by purpose: Mainly home (Home), portable (Portable), monitor (Monitor), mixing (Mix), human head record (Binaural Recording).
2. Headphone related parameters:
A. Impedance (Impedance): It is different from the meaning of resistance. In the world of direct current (DC), the effect of objects on the current is called resistance, but in the field of alternating current (AC), in addition to resistance hindering current, Capacitance and inductance will also hinder the flow of current, this effect is called reactance, and what we call impedance is the sum of resistance and reactance in a vector.
B. Sensitivity (Sensitivity): The sound pressure level that the earphone can emit when the power of 1 milliwatt is input to the earphone (the unit of sound pressure is decibels, the greater the sound pressure, the greater the volume), so generally the higher the sensitivity, the lower the impedance , The easier the earphones to make a sound, the easier it is to drive.
C. Frequency Response (Frequency Response): The sensitivity value corresponding to the frequency is the frequency response, and the graph is the frequency response curve. The range that human hearing can reach is about 20Hz-20000Hz, and the current mature earphone technology has reached it. This requirement.
