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Bluetooth headset
Your position:  Home > News > newclass > Headphones classification and .....


Headphones classification and technical knowledge

  • Author:jaskey
  • Release Date:2015-07-10

One.Headset is how to classify it? 
1.Press Transducer principle (Transducer) Minute 
Mainly moving coil (Dynamic) And electrostatic (Electrostatic) Headset two categories, although in addition to these two categories than there are a few other magnetic type, etc., but have been eliminated or professional use or for very little market share. 
Dynamic headphones principle: the vast majority (about99%Above) Earphones fall into this category, the principle is similar to ordinary speakers, in a permanent magnetic field of the coil and the diaphragm connected to a coil driven diaphragm sound signal current drive .
Electrostatic headphones: changes in the electric field diaphragm, diaphragm thin, precise to a few microns (currentlySTAXA new generation of electrostatic headphones diaphragm is accurate to1.35M), the driving force of the coil in the electric field driven diaphragm sound. 
2: Press openness points 
Mainly open, semi-open, closed (closed) 
Open: Open HeadphonesGeneral natural sense of hearing, wear comfortable, common in home appreciationHIFIHeadphones, the sound can leak, and vice versa is also possible to hear outside sounds, oppression smaller ear headphones .
Semi-open: no strict rules, the sound can only enter can also be out without, according to the needs and make appropriate adjustments .
Closed: ear to ear to prevent sound out of oppression larger sound correct position clear, professional monitoring of such common areas, but these headphones have a serious drawback is the bass bass,W100It is an obvious example. 

3: By Use 
Mainly home (Home), Portable (Portable), Monitoring (Monitor), Mix (Mix), Head record (BinauralRecording) 

Two: Headphones some of the relevant parameters and quality terms respectively mean? 
1.Headphones relevant parameters 
Impedance (Impedance): Note the difference between meaning and resistance in direct current (DC) World, the objects on the current role of obstruction is called resistance, but in alternating current (AC) In the field in addition to outside resistance will impede the current, capacitance and inductance also impede the flow of current, this effect is called reactance, and our daily said impedance is resistance and reactance on the vectors and. 
Sensitivity (Sensitivity): Point headphone input1SPL milliwatts of power when the headphones can be issued (sound pressure is expressed in decibels, the greater the larger the volume of sound pressure), so generally the higher the sensitivity, the smaller the impedance, the more likely headphone out loud, the more easy to drive. 
Frequency response (Frequency & nbsp; Response): The frequency value corresponding to the sensitivity of the frequency response is, the image is drawn into the frequency response curve, the range of human hearing can reach about20Hz-20000HzNow mature headphone technology have reached such a request.

2.Psychoacoustic terminology 
Range: musical instruments or the human voice could reach range between the highest sound and the lowest note 
Voice: also known as one of the basic properties of timbre, the sound, such as the erhu, pipa is a different tone 
Bass: the antithesis of music naturally neutral, that is, sound contracted some programs do not have their own characteristics, such as the one voice speaking in front of a jar obtained is a typical coloration. Coloration indicates a reproduction signal more out of (or reduce) some of the ingredients, which is clearly a distortion. 
Distortion: The output device can not fully reproduce the input, resulting in a decrease or distortion signal component waveform. 
Dynamic: Allows maximum information with minimum ratio recorded information 
Transient Response: equipment for music burst signal following capability. Good transient response equipment should be a signal to respond immediately, a stop signal to a halt, never clear-cut. (Typical musical instruments: piano) 
SNR: also known as the signal to noise ratio, the strength of contrast of useful signal components and noise, often expressed in decibels. The higher the SNR of the equipment it produces less noise. 
Air sense: to represent the open treble, or the sound field in the space between the instruments have an acoustic term intervals. In this case, high-frequency response can be extended to15kHz-20kHz. Antonym of "dark (dull) "And" thick (thick). " 
Bass extension: refers to the lowest frequency audio equipment that can be reproduced. System used to determine when reproducing bass sound system or speakers can dive to what extent the scale. For example, low-frequency extension of small subwoofer can go to40Hz, While large subwoofer is to dive16Hz. 
Bright: it refers to outstanding4kHz-8kHzHigh frequency band, this time relatively stronger than the fundamental harmonic. Bright itself is not a problem, live music concerts Jie bright sound, the problem is too bright and a sense of proportion, too bright (or even howling) would disgusting. 

Three: Knowledge about aspects of the amplifier 
1.Generally can be divided into a transistor amplifier (stone) and the tube (tube amp) amplifier types 
Preamplifier and power amplifier collectively. 
Referred to the amplifier, used to enhance signal power to drive the speaker sounding an electronic device. Power amplifier without source selection, volume control and other ancillary functions called post-stage. 
Preamplifier and power amplifier control section before, used to enhance the voltage amplitude of the signal, to provide input signal selection, tone adjustment and volume control. Preamplifier also called before the class. 
3.CPI zoom (class-A) 
Also known asAClass amplification. As a working state amplifier. At this point transistor or tube amplifiers will of the entire audio signal amplification. 
B amplification (class-B) 
Also known asBClass amplification. As a working state amplifier. At this point all the way to the transistor or tube amplifiers will amplify the positive half of the audio signal, and the other way transistor or tube amplifier amplifies the negative half of the signal. 
B class amplification (class & nbsp; AB) 
Also known asABClass amplification. One of the working status of the amplifier. At this point of the amplifier output stage in the output power of the state will be enlarged by the CPI is low, and when the output power is high then converted to B amplification. 

Four: About headphone wire 
Most headphone lines with copper as raw material, the average purity(Usually with a fewNHe represents, for example,4N,6N......) The higher the better the conductivity, the smaller the signal distortion, common are: 
TPC(Copper): purity99.5 percent 
OFC(OFC): purity99.995% 
LC-OFC(Linear crystal oxygen-free copper or crystal oxygen-free copper): purity99.995%The above 
OCC(Monocrystalline oxygen-free copper): the highest purity in99.996%Above, it is divided intoPC-OCCAndUP-OCC 

Fives: On the front-end equipment 
A lot ofHIFIFans used to be separated into two parts phonograph turntable and the decoder to obtain better sound quality music 
Front: Multi-audio system refers to a signal source, such asLPMicrogrooving slow turn player orCDPlayers, sometimes referred to as a tuner (tuner) and processes the received signal from the radio to the front stage. 
CDTurntable: theCDMechanical transmission part of the independent machine machine. 
D / AConverters: Digital Audio Products(For instanceCD,DVD) In the digital audio signal into an analog audio signal means.D / AConverter independent of the machine can be made to matchCDDial Use this time often referred decoder (DAC).