First, the introduction of headphones
Headphones are the integration of headphones and microphones. Actually, it's just that headphones and microphones are integrated.
Wireless headset adopts wireless receiving technology and consists of transmitter and receiver. Wireless headphones are the product of digital walkman. The wireless earphone is divided into three parts: the first part is the sound source, the second part is the receiver, and the third part is the earphone part. The main function of this part is to convert the signal sent by mobile phone or receiver into sound, and then transmit it to people's ears.
In addition, headphones also mean a generation gap. When I put on my headphones, my head is full of my things, so I can't hear you. So when you don't understand what I'm saying, you can say, "I brought you an earphone." The folk saying of headphones. There is a wall between you and me.
Second, the characteristics of headphones
Professional telephone headphones are designed for voice transmission. Characterized in that:
1. has a narrow frequency band and is designed for voice frequency. GN Netcom's headphones have a working bandwidth of 300-3000 Hz, where more than 93% of the voice energy is concentrated. Therefore, it has excellent fidelity to speech and strong suppression to other frequency bands.
2. Microphone adopts professional electret microphone, which works stably. After the ordinary microphone works for a period of time, the sensitivity decreases and the sound is distorted. If you use a professional telephone headset, this will not happen.
3. Light weight and high durability. Because users need to use headphones for a long time, professional flow headphones give consideration to comfort and high performance. GN Netcom's Profile headphones have a quality of only 23g. The quality of other headphones is also less than 60 grams.
4. Safety comes first. Everyone knows that using headphones for a long time will damage hearing. In order to reduce hearing loss, GNNECOM headphones have designed necessary protection circuits, and all GNNECOM headphones have undergone rigorous testing to ensure that they meet international standards *. Based on the study of sudden noise, UL Underwriters Laboratory in the United States determined that its safety limit was 1 18 dB. Occupational safety and health administration, occupational safety and; The Health Association (OSHA) limits the noise intensity of long-term exposure to noise environment to 90dBA.
5. Headphones are light, unique wire design, soft earmuffs, ergonomic, and extreme consideration for ears make the three frequencies more balanced and the sound quality more vigorous.
In a word, earphone is the integration of earphone and microphone, and "microphone" is the abbreviation of microphone, which is a transliteration of English.
Third, choose and buy
1, summary
Headphones play a very important role in computer peripherals. Games, music and videos are everywhere. In Internet cafes, offices and other occasions, headphones are even more essential for computer users. There are many brands of headphones on the market, and the product lines are also neat, ranging from simple headphones with a price of around 10 yuan to high-end headphones with a price of several hundred yuan 100, and then to electrostatic monitor headphones with several thousand yuan. When you want to choose a pair of products with low price, good quality and familiar brand recognition, you may be a little confused and confused. Because there are nearly dozens of products of well-known brands in the market, and there are nearly a hundred so-called "miscellaneous brands" that can't be named, but the prices are surprisingly low. As for whether it is a terrible "parallel import", you can't guarantee it, nor can the merchants who sell it, so the money in your pocket will not make such a guarantee. What should we do? Should we spend hundreds of dollars more on "expensive" products, or spend less on so-called "right" parallel imports or miscellaneous brands?
2. Performance indicators
When purchasing headphones, you should pay attention to the performance indicators on the earphone packaging or instructions, because poor quality headphones are often produced by some small factories, and some of their performance indicators are random and some are exaggerated. In general, the minimum frequency range of headphones should be 20 ~ 20kHz, the power should be greater than 100mW, and the harmonic distortion should be less than or slightly equal to 0.5%. If you can't meet the above requirements, you'd better not buy it. If the performance in the manual is too high, it is best not to buy this product.
3. Product quality
Headphones produced by big factories are generally made of engineering plastics, so their appearance is smooth and they have certain stress and toughness. No stiff feeling, fine workmanship, excellent hand feeling, and no rough feeling made of inferior plastic. In addition, the lead wire diameter of the earphone is relatively thick, which can ensure stable transmission and moderate soft and hard touch of the wire; The plug is made neatly, without burr, and the coating is smooth and uniform. If you don't meet the above conditions, you'd better not buy it.
4. Advice for you
If you are a K fan, it is recommended to buy capacitive headphones. If it is general play, you can choose brand headphones with good quality. Headphones, karaoke, no problem. It is recommended to use a separate sound card.
In fact, headphones are a very unsatisfactory singing equipment. If you want to sing well, I suggest you buy an independent microphone, within 200.