The advantages and disadvantages of a headset are not determined by external factors. The adoption of certain materials and certain structures cannot represent anything. The design of excellent headset is a perfect combination of modern electroacoustics, material science, ergonomics and acoustics aesthetics. "-- evaluation of headset
For the evaluation of a headset, we need to pass an objective test and subjective hearing before we can draw a conclusion. The objective test of headphone includes frequency response curve, impedance curve, square wave test, intermodulation distortion, etc.
Today, we only discuss the subjective audio evaluation of the headset, which is a necessary step for us to choose the headset.
To correctly evaluate the sound of the headset, the first thing to do is to understand the features of the sound of the headset. The earphone has the advantage which cannot be compared with the sound box, the phase distortion is small, the frequency response is wide, the transient response is good, the detail is rich, can restore the exquisite and lifelike timbre. But there are two drawbacks to earphones, which are precisely the two features of earphones, which are determined by their physical location relative to the human body.
The first feature: the head-to-head effect.
The acoustic environment created by the headset does not exist in nature. The acoustic wave in nature enters into the ear canal after interaction with the human head and both ears. The sound generated by the headset goes directly into the ear canal. Most of the records are made for sound box playback. The sound image is located on the connection connection of the two sound boxes. For these two reasons, when we use the headset, we may feel the sound image formed in the head. The "head-to-head effect" of the headset can be improved by adopting special physical structures, and there are quite a few sound field simulation software and hardware on the market.
The second feature: the low frequency of the headset.
Low frequency lower bands (40hz-20hz) and ultra-low frequencies (below 20Hz) are perceived through the body, and the ear is insensitive to these frequencies. The headset is perfectly capable of replaying this low frequency, but since the body can't feel it, it can feel like the low frequency of the headset is inadequate. Since the listening mode of the headset is different from that of the speaker, the headset has its own unique way to balance sound. The high frequency of the headset is generally improved, which gives a sense of detail-rich sound balance. A completely flat earphone with low frequency often makes people feel that low frequency is insufficient and the sound is thin. It is also a common method for the earphone to properly upgrade the low frequency, which can make the sound of the earphone sound plump and deep at low frequency. The most commonly used method is the light earphones and earplugs, which have a small area of diaphragm and cannot release deep low frequency. By lifting the middle part of low frequency (80hz-40hz), satisfactory low frequency effect can be obtained. Real sound is not necessarily good. In headphone design, these two methods are effective, but too much is not good. If the excessive lifting of high and low frequencies will destroy the balance of sound, and the stimulated timbre will easily cause fatigue. If is a sensitive area for earphones, music is the most informative and sensitive place for human ears. The design of earphones is cautious to the intermediate frequency. Some low-grade earphones have limited frequency response range, but they can get bright sharp timbre and muddy and powerful sound by lifting the upper and lower part of the intermediate frequency, thus creating the illusion of high and low frequency. Listening to the earphones for a long time will be boring.
A good headset sound should have the following characteristics:
One, the bottom is pure, without any unpleasant "hiss", "hum", "coax".
Second, good balance, sound color from no bright or too dark, high and low frequency energy distribution uniform, natural integration between the frequency smooth, without inconsistency and burr.
High frequency extension is good, delicate and smooth.
Low frequency dive deep, clean and full, full of elasticity and strength, without any feeling of fat and slow.
Medium frequency distortion is very small, transparent and warm, human voice is kind and natural, there is thickness, there is magnetism, not exaggerated tooth and nasal sound.
Good analytical power, rich details, small signal can be clearly replayed.
Seven, have good sound field to depict ability, sound field is open, musical instrument localization is accurate and stable, there is enough information content in sound field, do not have empty feeling.
Eight, dynamic no obvious compression, with a good sense of speed, high volume without distortion or little distortion.
Such a headset can perfectly replay any type of music, with good fidelity and music sense, without fatigue caused by long-term use, and can immerse listeners in music.