281 views Yuda Electronic (HK) Technology Co.,Limited. 2018-05-25
1,How to know if headphones is good or bad – sound quality
Measuring headphones can use some methods to evaluate the speakers, but the headphones are different from the speakers. The sound waves emitted by the speakers attenuate and interfere in the air, interacting with the human head and ears, and the earphones sound directly into the ears.
The sound quality of a headset is more important than its technical performance. A phone headset can have a different sense of hearing for different people. Therefore, the recommendation can only be used as a reference, and you must have the chance to listen to it personally.
What is a high-fidelity headset? The main performance of the high-fidelity headphones recommended by the International Electrotechnical Commission IEC581-10 file is: frequency range 50Hz-12500Hz; The allowable error of the frequency response is plus or minus 3dB; The slope of the frequency response curve does not exceed 9dB per octave; the difference between the average sound pressure level of the unit within the same octave band within 250Hz-800Hz does not exceed 2dB; within the range of 100Hz-5000Hz, the sound pressure level is 94dB. Harmonic distortion does not exceed 1%, and does not exceed 3% at 100db; the frequency response of headphones is allowed to drop between 2KHz and 5KHz to improve transparency and spatial perception.
The advantages of the headset relative to the speaker are in details. The actual listening to a good headset should be clear, rich in detail, and inaudible; low-frequency deep and clear, and effective control; the entire frequency band should be smooth and flat. For any pair of headphones, triple frequency may not be perfect, and the smooth and natural connection between them is the most important. If it is a wireless headset, the noise should be as small as possible.
2, How to know if headphones is good or bad – comfort
The comfort of the headset is also very important, a headset can not be too tight or too loose, it should be able to wear for a long time. The adjustability of the headband can guarantee the use of different head shapes and different purposes. Professional audio personnel sometimes need a single unit to monitor, the unit needs to be able to rotate, and the length of the other line and the entry mode of the unit are also factors that affect the use. . When adjusting the length of the headband, pay attention to: the headband is short, the pressure on the top of the head is high, the pressure on the head of the headgear is small, and when the headband is long, Three points of pressure are the most comfortable.
3, How to know if headphones is good or bad – durability
Durability is very important in portable audio and professional fields. Portable audio headsets are lighter and easier to be damaged; professional headsets are used and moved frequently, and the cables are easily broken. The headset is required to be very strong and the components are easy to maintain.
Another related to durability is to bear power, a very small power can push the headset very loud, power too high may be damaged, generally the general headset power is less than 100mW, professional headphones in 100mW-1000mW . High-impedance headphones have strong voice coil resistance, unlike the low-impedance headphone voice coils, which are as sensitive to power changes as they are more durable.
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