What are Headphones?

Earphones; Headphones; Head-sets; Earpieces are a pair of conversion units that accept electrical signals from a media player or receiver and use speakers close to the ears to convert them into audible sound waves. The headset is generally detachable from the media player and is connected using a plug. The advantage is that without affecting others, you can listen to the sound alone; it can also isolate the sound of the surrounding environment, which is very helpful for people who use it in noisy environments such as recording studios, bars, travel, sports, etc. Earphones were originally used for telephones and radios, but with the popularity of portable electronic devices, earphones are mostly used in mobile phones, walkmans, radios, portable video games and digital audio players.

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Headphones are human walkman

The headset is based on its

Sound quality

1. Because it is too close to itself, it is ignored, and the headset is such a product. In real life, you can see headphones everywhere, at home, outdoors, various

   Bluetooth

   First use

   range

   The range between the highest and lowest of an instrument or human voice.

   Tone

   It is also called fret, one of the basic attributes of sound, such as erhu and lute are different tones.

   Tone dyeing

   For example, the kind of sound you get when speaking into a jar is a typical tone dye.

   dynamic

   Allows recording the ratio of maximum information to minimum information.

   Transient response

   The ability of equipment to follow sudden signals in music. Equipment with good transient response should respond immediately when the signal comes, and stop when the signal stops. (Typical instrument: piano).

   Signal to noise ratio

   Also called signal-to-noise ratio, the useful component of a signal is compared to the strength of the noise, often expressed in decibels. The higher the signal-to-noise ratio of a device, the less noise it produces.

   Sense of air

   Acoustic term used to indicate the openness of a treble or the sound field with space between instruments. At this time, the high-frequency response can be extended to 15kHz-20kHz. Antonyms are "dull" and "thick".

   Low frequency extension

   Refers to the lowest frequency that audio equipment can reproduce. It is used to determine how much the sound system or speaker can dive when playing back bass. For example, the low frequency extension of a small subwoofer can reach 40Hz, while the large subwoofer can dive down to 16Hz.

   Bright

   Refers to the high frequency band of 4kHz-8kHz. At this time, the harmonic is relatively stronger than the fundamental wave. Brightness is not a problem in itself. All live concerts have bright sounds. The problem is that the brightness is so good that you can control it. Too bright (or even howling) is annoying.

   Misunderstanding 1: Use loud volume when burning headphones

   Some people think that the new earphones need to use a large volume cooker, so that the earphones can enter the normal working state quickly and well, and the time is also saved.

   This approach is actually a taboo in the use of headphones, because under normal circumstances, the diaphragm of new headphones is too rigid, and the large volume of the cooker will cause the frequency of vibration to exceed the capacity of the new diaphragm, causing damage to the diaphragm . When cooking, you should use a moderate volume, and you can use it for a period of time.

   Misunderstanding 2: The volume is too loud when listening to headphones

   Listening to a concert at a large volume for a long time has a very adverse effect on people's hearing. Gradually, it will cause a serious decline in hearing and cause long-term damage to the ear. Cause physical and mental fatigue and mental fatigue. In addition, the large volume has a very large impact on the diaphragm of the headset. If the volume is used for a long time, it will cause distortion of the sound effect and even cause the diaphragm to be damaged. Therefore, when listening to music, choose a moderate volume, which should not be too small, affect the beauty of the music, or be too large, and hurt your ears. A moderate volume will also extend the life of the headset and is one of the best maintenance methods.

   With the acceleration of China's urbanization process, more and more people choose to relieve various pressures through the outdoor lifestyle. A variety of audio and video entertainment products have become indispensable assistants, so whether indoors or outdoors, headphones are gradually Become a necessity in people's lives.

   We often see people in the morning training wearing earphones listening to the radio, and students on campus can also be seen listening to music while walking or cycling. Seeing young people listening to rock music on the bus is so loud that even the neighbors can hear it. Using earphones in this way for a long time can cause noise-induced hearing loss.

   After research by scientific and technological personnel in China, for subjects with an average age of about 23 years, using earphones for 1 hour and 1-2.5 hours per day compared with the control group, there were significant differences in hearing threshold. He suggested that the use of earphones can lead to noise-induced hearing loss, especially in the high-frequency region above 4000 Hz, which is significantly larger than the low-frequency region. The longer you use earphones, the more severe your hearing loss will be. Some scholars have reported that it can cause up to 4000 in noisy environments.

   Because the earphones are closer to the inner ear tissue than ordinary external noise; users must take necessary protective measures. Studies show that hearing damage from pleasant music is minor, but long-term exposure to high-decibel sounds, whether music or noise, can cause hearing damage. Noise can cause sensory nerve hearing damage in the inner ear. When high-energy sound waves shock the fluid in the cochlea, they can overstimulate and cause cell death. Hearing damage is formed over time. If you are exposed to noise for a long time, even if each time is short, it can cause hearing loss.

   The results of a survey published by the American Medical Association Journal in 1998 and experiments by Shanxi Medical University in China have shown that long-term exposure to high noise levels has a negative impact on hearing.

   If you use headphones on the street, in addition to increasing the volume and causing hearing damage, focusing on listening to music can easily make users unconscious of peripheral sounds, increasing the chance of danger, and should not be used by children.

   Check if the headset is broken

   Connect the headset to a good MP3, mobile phone or radio with a corresponding headset interface, and listen to the sound to determine whether the headset is normal.

   Tips: Some headsets have wired volume control. Check whether the volume is set to the lowest mute.

   Check if the computer headset is in poor contact with the host interface

   Replug the headphone cable to the computer host interface to ensure a good connection. If some computer hosts have two external jacks on the front and rear, you can try another jack.

   Tips: Don't plug the headphone plug into another jack, otherwise you will have a bull's head and a horse's mouth, of course, the headphone will be silent.

   Check if the computer volume setting is muted

   Check if the rightmost speaker in the taskbar at the bottom right of the screen has the speaker mute sign as shown below

   If the above picture is displayed, it is obvious that the computer system is in silent mode due to misoperation. At this time, double-click the speaker icon with the mouse and click the "Mute All" or "Mute" check box in the pop-up window to remove the check. Just fine.

   Check if computer volume is at minimum volume

   If the speaker icon on the right side of the taskbar is as shown below, there is no red mute sign.

   You can double-click the speaker icon at the far right of the taskbar in the mouse. In the pop-up window, use the mouse to drag the slider in the red box below to the appropriate position.

   Check if the sound card driver is missing

   Check if there is a speaker icon on the status bar at the far right of the taskbar at the bottom right of the screen, as shown in the figure below.

   If there is no speaker mouse icon on the status bar, you can right-click my computer with the mouse and click "Manage" in the pop-up window, as shown below

   In the pop-up "Computer Management" window, click "Device Manager" with your mouse to see if there is a device marked with "?" In the right window. If this device has the words "Audio" or "Audio Device", as shown below As shown, the sound card driver has been lost and you need to install the sound card driver.

   Install the sound card driver

   At this time, if you have a sound card driver CD, you can right-click the device and click "Update Driver" in the pop-up menu, as shown below

   Prepare the sound card driver CD-ROM. After the window shown in the figure below pops up, put the CD-ROM into the CD-ROM drive and follow the window prompts.

   If you do not have a sound card driver CD, you can download the corresponding driver to a folder through Baidu search. Double-click the sound card driver and follow the prompts. As shown below:

   If the above operation does not solve the problem of the silent sound of the headset without ensuring that the headset has its own fault, it can be presumed that the computer's independent sound card or onboard sound card has a problem. You need to open the chassis again to insert or remove the sound card or replace the sound card or motherboard.

   Tips: If you do not have experience in assembling a computer host, you need to ask a professional for assistance.

   Nowadays more and more people are beginning to pay attention to the requirements for sound quality, and it is a matter of course to have a good pair of headphones. But everyone bought it and used it and found that it was not as good as others talked about. They began to wonder if they were buying fakes. In fact, otherwise, really good headphones require a listening process, and this process is what we often call "cooking." Many people may not understand why headphones are burning. In fact, this is like running a car when you first bought it. The earphone diaphragm itself has internal stress during the manufacturing process, and assembly stress is generated when the voice coil is bonded and fixed on the frame. What we call the "earphone" is to gradually eliminate these stresses and gradually release the diaphragm. Nice process. If the earbuds are boiled well at the beginning, the diaphragm will be loosened gradually, so that when you listen to music again, the diaphragm will vibrate very freely and the sound quality will be improved a lot. So it is necessary to burn headphones.

   1. The sound is pure, without any unpleasant "hiss", "weng", "coax".
   2. The balance is good, the sound is never too bright or too dark, the high and low frequency energy is evenly distributed, the fusion between the frequency bands is natural and smooth, there is no suddenness and glitches 3. The high frequency extension is good, delicate and soft.
   4. Deep dive at low frequency, clean and full, full of flexibility and strength, without any fat and slow feeling.
   5. The intermediate frequency distortion is extremely small, transparent and warm, the human voice is friendly and natural, has thickness, is magnetic, does not exaggerate and nasal.
   6, good resolution, rich in details, even small signals can be clearly reproduced.
   7, has a good sound field characterization ability, the sound field is wide, the instrument positioning is accurate and stable, there is enough information in the sound field, there is no hollow feeling.
   8. There is no obvious compression in dynamics, and it has a good sense of speed. It does not distort or distort at high volume.

   Impedance: See above.
   Sound range: the range between the highest and lowest sounds that an instrument or human voice can achieve. Voice: also known as fret, one of the basic properties of sound, such as

   Different headphones should be used according to the purpose. If it is for general learning and listening to news, you only need to choose a lower-priced head-mounted, ordinary electromagnetic headphones, and the earmuffs with volume adjustment is better. For music, choose high-fidelity headphones. The most convenient to use is a wireless headset, no connection required. In addition, there are headphones with a radio to listen to various programs at any time. ^[1]