Completed campus love novels

The "pot" of the earphone is actually the pot of the diaphragm ring. The mechanical compliance of the diaphragm ring of the new earphone is poor, which leads to great distortion. After a period of use, the compliance will gradually improve and the distortion will gradually drop to the normal level. For the power amplifier, as long as it is not turned off, it is turned off, but for the earphone, a certain power signal must also be fed in to keep its diaphragm vibrating.

As we all know, new cars and machines have to go through a stage called "running-in" before normal use, so that the internal mechanical devices can fully coordinate and cooperate and enter the best state in advance. Similarly, the pressing unit of the earphone (the speaker in the earphone) is also a mechanical device, which should be a combination of semi-mechanical and semi-electronic, mainly composed of voice coil, diaphragm and positioning ring (metal ring for fixing the diaphragm). The mechanical part belongs to a compliant system, including a diaphragm and a voice coil fixed on the diaphragm. A compliant element can be equivalent to a capacitor in an electronic element. Capacitors store electrical energy, while diaphragms and voice coils store kinetic energy. The flexibility of earphone unit is equal to the parallel value of diaphragm and voice coil, which is the key to determine the sound quality. The materials used in the diaphragm and voice coil are highly flexible materials, and the internal molecular structure is unstable at the initial stage of shaping, so the flexibility is also unstable. When it was first used in a loudspeaker unit, its flexibility was usually small (generally blunt) because its molecular structure was relatively stable. After a long period of exercise, the distance between molecules is far away, the uniformity and compliance of distribution are increased a lot, and the overall compliance of the speaker is also increased a lot. The most important value of the speaker is the lowest resonance frequency, which is professionally called F0. This value basically determines the lowest frequency that the speaker can reach, which depends on the equivalent mass and flexibility of the speaker, because the speaker is a mechanical vibration system, which is equivalent to a * * vibration circuit on a circuit. * * The frequency of oscillator circuit depends on inductance (equivalent mass of speaker) and capacitance. FO and inductance are inversely proportional to capacitance, so the greater the flexibility of the speaker, the lower the F0 of the speaker, and the better the low-frequency dive. The change of compliance leads to the global situation, and all mechanical data of the speaker will change, such as the mechanical quality factor of the speaker. Large compliance means that the mechanical loss increases, so the mechanical quality factor will become lower, which means that the sound sounds softer. Therefore, the new headphones all sound like low-frequency diving is not deep, the volume is small and stiff, the mid-frequency performance is not soft enough, and the high-frequency is burr and too sharp (of course, this is also determined by the quality of the headphones themselves). After cooking for a period of time, the flexibility of the speaker unit will increase and it will be easy to move back and forth, so that the sound will be full and relaxed and the sound quality will be better.

How to cook headphones?

(A) How to cook headphones

There is no difference in theory and procedure between the method of cooking headphones and the method of cooking speakers, but you should be more careful when cooking headphones than when cooking speakers. If the pot is not good, it may shorten the service life of the earphone, and even cause permanent physical damage to the earphone, such as careless power overload and excessive amplitude, which will lead to the vibration of the diaphragm. When a friend was cooking Sennheiser headphones, there was a tragic situation that the fixing glue of voice coil lead fell off and hit the diaphragm because of excessive amplitude, which was undoubtedly caused by excessive volume. The diaphragm of the earphone has its service life, just like the speaker of the speaker, but because the amplitude of the diaphragm of the earphone is very small, it is much smaller than the speaker diaphragm, so the service life of the earphone will be longer. If it is used normally, it will be fine for decades. However, if you want to cook headphones quickly and drive them with high power for a long time, the service life of headphones will inevitably be shortened. If the machine is not cooked properly, it is likely to cause irreparable physical damage to the headphones. Therefore, it is very important to cook the headphones to the right volume.

Many friends who have bought new headphones like to listen to the full frequency response with frequency sweep software, but they often feel that the frequency response of new headphones is uneven. Why? This question is easy to explain. If the vibration amplitude of headphones is very consistent, then the sound you hear must be uneven. This is because human ears have different sensitivities to vibrations of different frequencies. It is incorrect to test the frequency response performance of headphones in this way. But also avoid using single-frequency signal to test headphones, which can easily damage headphones, especially high-sensitivity walkman headphones and some monitor headphones products. In the second and third stage of music selection, the music used to cook headphones should be music with little movement. The higher the impedance, the lower the sensitivity of headphones, the longer the cooking time should be, and the overall cooking time of headphones should not be less than 50 hours.

In addition, two problems should be paid attention to when cooking headphones. One is to cook headphones carefully, especially high-gear headphones, and don't use electronic sound. The bass component in electronic music is too strong, which may lead to overload for high-sensitivity headphones and cause irreparable physical harm. In short, slow fire and slow stew are full of flavor. Another point is not to use single-frequency sound signals to test headphones, especially not to use low-frequency signals to measure. First, the human ear is very insensitive to low-frequency signals. For example, if you can hear a signal of 20Hz, the power of the headphones must be overloaded, and some low-power headphones may have been burned out or the voice coil is deformed. 20Hz is a limit. Between listening and listening, some people with bad ears can't hear, so don't call your new headphones at some extreme frequencies.

(b) Make a good sound slowly.

The only universally applicable method for cooking earphones is "step by step". At first, use soft music, let the headphones relax at low volume 100-30 hours, and then cook with ordinary music (except rock and dance) at medium volume 100-200 hours. If you don't listen to harsh high notes at this time, it will become round and natural, the midrange will be warm and kind, and the low frequency will no longer be a chaotic rumble, but full of details, so congratulations, OK, don't be eager for quick success.

Pay attention to two points in the process of cooking: first, you can't work continuously for too long! Because the voice coil has resistance, it will heat up after working for a long time, and it may burn out the voice coil! It's best to stop for a few minutes every two hours and then continue. Second, the volume must not be too high. Earplug diaphragm is a very fragile material. If the volume is high, the stroke of the voice coil will be large, which will lead to the looseness of the voice coil and the deformation and even tearing of the diaphragm.

Headphones are mainly the diaphragm of headphones. At present, the diaphragm thickness of electrostatic headphones is as thin as 135 micron, and the diaphragm of dynamic headphones is only a few microns to a dozen microns (the diameter of our hair is about 60 ~ 90 microns). The diaphragm itself has internal stress in the manufacturing process, and there is assembly stress when the voice coil is bonded and fixed on the frame. The earphone we are talking about is the process of making these stresses disappear gradually, making the diaphragm smooth gradually and making a good sound.

I thought that although the audio equipment was neither a construction machine nor an iron car, there were similarities. Good things should be ground more and cooked slowly to make a good sound! The boiling machine is still divided into five steps: relaxing muscles and dredging collaterals, practicing martial arts, beating and making a debut. Take headphones as an example:

1, relax your muscles? Drive the earphone 12 hours at one third of the normal listening intensity (it is best to use 100 ~ 15000 Hz/5s sweep signal);

2. Tongluo? Drive the earphone 12 hours at two-thirds of the normal listening intensity (it is best to use 50 ~ 18000 Hz/3s sweep signal);

3. Wushu? Drive the earphone with normal listening intensity for 72 hours (preferably with 20 ~ 20~20000Hz/2s sweep signal);

4. Snoring? Drive the headphones for 24 hours with four-thirds of the normal listening intensity (it is best to use 18 ~ 22000 Hz/ 1s sweep signal);

5. Debut? Enter the normal use stage.

Step 1: Get a new earphone, you need to cook it to make the diaphragm loose and not tight. As we all know, general earphones are dynamic open coils, and the principle of sound production is that the coils emit magnetic fields of different sizes, thus pushing the diaphragm and using the amplitude of the diaphragm to produce sound. (This principle does not apply to electrostatic headphones) In other words, the final sound is produced by the vibration of the diaphragm, and the headphones we often say also refer to the diaphragm of the earphone.

The new earphone diaphragm is like an unused rubber band, which is not elastic enough and has a short stroke. If we listen to some heavy metals at high volume at this time (for example, our deputy host Glacier just got headphones, which really made him feel bad for many days. An avid metal fan came to listen to some "ferry" cooking machines, and the final result must be broken. The purpose of the first step is to quickly age the mechanical system of the earphone by artificial means.

At this step, there are many ways we can choose the boiler. Let me give you an example:

(1) software method: download a software and cook it with white noise;

You can use the rambler box to make tools.

Download address: 2005/support/sup _ software.php.

(2) Radio receiver method: tune to a place where there is no signal, and its noise is also called white noise;

3. Music machine cooking method: Use some music, and the best machine cooking music is Ferry (other music is ok, as long as the volume is not too loud).

The second step is to make the aged earphone (referring to the aging of the mechanical system in the first step) adapt to the sound of various frequencies as soon as possible and emit better sound from the surface. We generally have a preference for listening to music, either high notes or low notes. Even if we listen to everything, some frequencies are rarely used, which is the key to our beautiful voice. The only way is to use the software, select the signal generator, and then put it on for three hours, cook it when you have time, and cook it for ten or twenty times.

The newly bought headphones have good hearing. But compared with my friend's earplugs of the same model, they are always unsatisfactory. The bass is tight and stiff, the midrange is not soft or full, and the treble part is full of burrs. Why is this happening? Because this new earphone hasn't been cooked yet! (3) Method of testing the tone generator of boiling earphone.

In the past, it was very simple to connect the radio directly, tune to the frequency without the radio, and use the "hissing" sound (pink noise) from the radio to make the headphones work for a long time to achieve the effect of the boiler. But this method is not obvious, so it is better to put on headphones and listen to music directly, which is faster. It is also useful to use a special frequency generator to generate a fixed or scanned frequency and then input it into the earphone. This method has obvious effect and can shorten the time. But most players don't have this kind of equipment, what should I do? What is the most efficient way to cook headphones? Today, with the rapid development of computers, many enthusiasts have written some programs to process some waveforms and frequencies through computers and output them through sound cards, so as to achieve the effect of some real frequency generators. This is called "virtual instrument". There are many frequency measuring softwares like this. The author is using a software called test sound generator, which is simple and easy to use, a joke that ten adults must watch, with specific functions and small size. Let's talk about how to cook headphones with it.

Cooking machines generally use low frequency. So, just set TTG to low frequency. There are two methods, one is to output at a fixed frequency; The second is to use the scanning frequency. The effect is similar. The method of fixing frequency is to input a numerical value in the frequency of constant tone, generally 20 to 50, or you can choose LOOP. The duration is not important. Sine (sine wave) gain is 0 DB, and then you can plug headphones into the sound card to make it work for a long time.

Sweep frequency method is to input the starting frequency with the starting frequency of sweep frequency and the ending frequency with the final frequency. Generally speaking, I think the range from 20HZ to 100HZ is more suitable. Duration is the time required to set a scan, and then other operations are the same as fixed frequency. Many friends have asked me why I only do low frequency. In fact, we can know why from the boiler principle mentioned above.

Pay attention to two points in the process of cooking: first, you can't work continuously for too long! Because the voice coil has resistance, it will heat up after working for a long time, and it may burn out the voice coil! It's best to stop for a few minutes every two hours and then continue. Second, the volume must not be too high. Earplug diaphragm is a very fragile material. If the volume is high, the voice coil will travel long, which will lead to the voice coil loosening, diaphragm deformation and even tearing. Especially the "fragile" earplugs of 888, you should be careful. When adjusting, it is only necessary to adjust the sound waves or air vibration that can be clearly heard. Don't turn it too much. You can hear the diaphragm vibrating violently. Be careful to protect your headphones.

Finally, I want to emphasize that not all headphones will sound better after cooking, which depends on the quality of the headphones themselves. It is normal for some headphones to have no obvious effect after cooking. The purpose of our cooking machine is to help it quickly pass the aging adjustment period and stabilize the physical characteristics of its components. The vibration system of unheated headphones may be very tight and hard. By cooking, the vibration system can be relaxed and the parameters tend to be stable, so the sound quality will be better. Also, don't think too well about the effect of the cooker. Cooking for a while won't be too effective. The greater the hope, the greater the disappointment. To have a good sound, mainly depends on the sound source and other equipment.

Instance operation

Tell me more about 3300 pots of headphones.

As a music mobile phone, the performance of 3300 is quite satisfactory. Some people will find that the performance of original headphones is not satisfactory, but it can be improved by boiling headphones, whether old or new. If an audio conversion cable is connected to a high-quality earphone, such as the frequency response range of the Sennheiser MX500 is 18-22000 Hz, the effect will be incredible. As for the principle of boiling headphones, it has been introduced before, so I won't go into details here.

How to cook headphones:

1 is to turn on the full frequency first, in order to get through the strange sound of headphones. The method is to play continuously with a variety of different frequencies. Generally, you should rest after playing for one or two hours, but the volume should not be too loud, and it will have obvious effects in about ten hours. Even the bass performance of the original headphones has been obviously enhanced after this stage, but due to the limitation of my sound card, the maximum signal of the headphones I made can only be 1 1025 Hz, but it is absolutely enough. The vibration frequency range of the sound that adults can hear is about 20-20000Hz, the sound waves below 20Hz are called infrasound waves, and those above 20000Hz are called ultrasonic waves. Infrasound and ultrasound are inaudible sound waves. But I had an experience before, that is, I listened to these audio signals (with a big speaker) at a friend's house, trying to see if anyone had golden ears, but just then my friend's children (about 4-5 years old) ran out of the room and shouted what sounds were so ugly, which proved that children's ears were stronger than adults. (Note that it is best not to listen to the earphone signal, which will make people uncomfortable. )

The next thing to do is the sense of music (especially high-quality headphones will be very helpful). Most of them use pure music soundtrack, with high sound quality and wide audio frequency. Personally, I prefer City of Sorrow and Happy Hotel. Use the same method as above. If you listen to more pop songs at this stage, you can change your taste. Listening to these pure music will give people a very comfortable feeling

At this time, you can choose your favorite music to play, so that 3300 can give full play to this type of music. In fact, the sound quality of headphones will be improved if they are used for a long time without being boiled. But I have never been able to get through the weird classics and music sense, and the sound quality has not been fully exerted. So I said that old headphones should also be cooked, but the impact is big and small. First of all, we need some CDs, because the sound quality of CDs is the best music quality that can be achieved by the current civilian level (except for the impractical SACD and DVD-AUDIO), and dad films are relatively cheap. All the following operations are also based on CD walkman. The "pan" machine disk is preferably a disk with a very wide frequency range, and it is definitely not possible to use an ordinary pure voice disk alone. Recommend some genuine CDs, such as Titanic, Sister Drum and 18 12 overture. There are also some excellent pop music and Chinese folk music that are also good choices. Below, the author will "cook" your earplugs.

On the soundtrack CD of Titanic, the third paragraph is "SOUNTHAMPTON", the ninth paragraph is "THE SINKING" and the last paragraph is 10 "The Death of Titanic". Southampton is suspected of copying Beethoven's Ode to Joy, but the sound level is very clear and the music contains a lot of information. The treble is soft and dense, and the weak burst of low-frequency energy gives people a deep feeling. This track has excellent performance in all frequency bands, which is very beneficial to the overall vibration of earplugs. The Sinking and Death of Titanic, like its predecessor, has excellent full-frequency performance, but it is better in dynamics, familiar and full of sound energy. If you don't "cook" by listening to such music, the diaphragm of the earplug will "suffer"!

The soundtrack of the domestic animated film Lotus Lantern includes the fourth paragraph "Overture: Lotus Lantern" and the first paragraph 13 "Dance of the Full Moon". "Overture: Lotus Lantern" started with a soft voice, and later the more dynamic the voice, the more energetic it became. There is also a vocal chorus in the middle, which should be said to be a very good piece, but its bass is slightly less. The low frequency of the opening sound and a female voice in the middle of the full moon dance music are very helpful to improve the low frequency of earplugs.

Rolling stone 24K24BIT gold disc? The first paragraph of Wan Fang's CD "Guessing the Heart" is reserved for the author to listen to, and it is also a very good choice for "boiling" earplugs. The first paragraph of this piece is mainly solo, and later the instruments are more and more abundant, but the whole piece is still gentle. Potted earplugs can't be potted all the time, and some adjustments need to be made in the middle. Moreover, the voice of this track is excellent, and the earplugs can be used for audition after being "cooked".

Get a walkman and earplugs ready and put them in the CD. Turn it up a little. In order to prolong the playing time, the output power of the current walkman is generally low. Users can adjust the volume to above 90%, but it is best not to turn it on. The process of boiling earplugs should be gradual. First, use some soothing music, such as Mind Guessing mentioned in the above question, and put it on for 5~ 10 hours. Then switch to slightly "powerful" music, such as Southampton, and continue to play 10 hours or more. Finally, music such as "The Sinking and Death of Titanic" will be played until the earplugs are basically "boiling". In order to determine the boiling condition of earplugs, users can listen to them every 10 hour. Generally speaking, there will be some gaps in the effect. When the gap is not obvious, it can be regarded as "boiling". Of course, this identification method is not easy to realize, just prepare to "cook" for 50~ 100 hours. However, if you want to succeed, you need to use it constantly every day. It usually takes about 2 months to make earplugs really achieve the best effect.

Contrast of sound before and after

I have a lot of pot earplugs, and the most touching one is Sony MDR-E888. This is a very advanced earphone at present, and the market price is around RMB 400 yuan. However, when this earplug is just bought back for audition, there are often problems such as high pitch dryness and a lot of intermediate frequency burrs, which makes people feel that it is not worth 400 yuan at all. However, once MDR-E888 is cooked, it will radiate dazzling light: soft high frequency, warm but burr-free intermediate frequency, deep and powerful low frequency, and it is hard to believe that it is the same earplug. Personally, I think MDR-E888 is the most needed earplug I have ever seen, which may be related to its unique biological diaphragm. Other earplugs also need to be boiled. After "boiling", the low-frequency elasticity is enhanced and the high-frequency softness is improved, but the result seems to be less exaggerated than MDR-E888!

Filling earplugs is a long process, which needs to be used reasonably in daily life. If you can "plant" your earplugs properly, then I believe she will definitely bring you different surprises!

Normal should be divided into stages, and it is best to use swept frequency signal:

The first stage, about 12 hours, chooses light music or white noise to warm up, initially moves the unit part, and standardizes the listening volume by 80%.

In the second stage, 12~24 hours, you can choose tracks with large dynamic range, give earplugs an all-round exercise, and standardize the listening volume 120%.

The third stage is 12~24 hours. When listening to earplugs for the first time, you can choose to focus on the part where the signal is not satisfactory, and standardize the listening volume 150% ~ 200%.

As long as you are patient enough and do these steps step by step, even the most exquisite earplugs are completely fine.

In fact, the best cooking method is to preheat it for about 24 hours, and then start using it. It takes about 100 hour, and it can naturally reach a good state. There is no need to pursue the effect of boiling earplugs too deliberately. Caution backfires.

"Potting machine" means that the stability of sound quality needs to be used for a period of time. If you listen to 1 hour every day, it will take about 4 or 5 months for the sound to basically stabilize. Then these four or five months are the "off-line" period. Proper cooking will not damage headphones, but will only accelerate the stability of sound quality. The word "stability" is used here, not "improvement". Some headphones (speakers) are not necessarily better than brand new ones. For headphones, you can use the following cooking methods:

1, using pink noise or white noise as the signal source.

2. At the initial stage, it will continue to boil at normal volume for 24 hours.

Step 3 stop for 4 hours

4. Use a loud volume (just enough for your ears) for 8~ 12 hours.

Step 5 stop for 4 hours

6, normal volume pot for 24 hours

7. Repeat as above, the earphone will be "cooked" in a week or so.

Pay attention when cooking the machine. If you are not sure whether the volume is too high, ask someone to listen to it for you. If you can't last 10 seconds with headphones on (for reasons you don't like), the volume is too high.

CD 1:5 minutes of white noise, 1 minute of broken glass, 30 minutes of violin and piano concerto, 2 minutes of 80-25KHZ sweep, 5 minutes of white noise, 3 minutes of Apollo13 takeoff, 2 minutes of 80-25KHZ sweep, 10 minute.

Cd2:15min pink noise,15min 20-20KHZ sweep, 5min drum,15min white noise, 5min sweep, 5min drum, unix web host,15min symphony.

Play CD 1 20 hours at 2/3 of the normal listening volume on the first day.

The next day, play CD2 1 1 hour at 2/3 of the normal listening volume, and play CD2 1 1 hour at 2/3 of the normal listening volume.

On the third day, play CD2 at the normal listening volume of 4/3, 18 hours.

On the fourth day, play CD 1, 1 1 hour at the normal listening volume, and play CD 2 1 1 hour at the normal listening volume.

On the fifth day, play CD2 15 hours at the normal volume, and call it a day. A total of 97 hours