Sound high frequency, intermediate frequency and low frequency
Release Date: [2016-11-11 17:47:28]   Total read [342] Times
This project is easy to understand, but is also easy to produce the misunderstanding on the text message. How do you say? Big family would say: the speaker is too high, the bass is too little. This is the amount of high, medium and low frequency distribution. Problem for if the from 20 hz to 20 KHZ bandwidth only by three points, that is bound to confuse "inaccurate". What your bass is there? How low? More accurate to describe the words, it is necessary to make 20 hz - 20 KHZ bandwidth to be subdivided.
According to the points of the TAS and Stereophile method is very simple, they have high, medium and low each subdivided three paragraphs, namely becomes "low intermediate frequency, intermediate frequency and high frequency" rule of thirds. The rule of thirds as general of twelve-tone equal temperament, fairly regular. But on the Chinese will have some small problems on translation, such as "low frequency" we called the "low" or "low frequency"? So high frequency? "High frequency"? For Chinese people, such a foreigner, I'm afraid it won't work. So long ago I the frequency width of reference instrument, and orchestra of sound, will be divided into 20 hz - 20 KHZ frequency of the extremely low frequency, low frequency, low frequency, intermediate frequency, high frequency, high frequency, seven period of extremely high frequency, etc. Of the seven noun in conformity with the general habits of the Chinese people, and easy to remember, don't confuse.
Extremely low frequency
From 20 hz to 40 hz this octave I called extremely low frequency. This spectrum instruments are very few, perhaps only the bass, bass bassoon, mediating, organ, piano and other Musical Instruments can reach so low range. Due to the extremely low frequency is not a musical instrument is the most beautiful range, so few composers write notes so low. Unless it's pop music in electronic synthesizer deliberately, or extremely low frequency is of little use for audio fans. Some people mistake one thing, said that although instruments less low pitch, but harmonics can be low to pitch the following. In fact this is not correct, because the pitch is the sound of musical instrument with the lowest sound, the sound will only with two times, three times, four times, five times the & # 8222; Down climb up, and there will be no sound. It's like you would a single string taut, the length of the string vibration frequency is pitch, half, a third, a quarter, one 5 & # 8222; Chord is harmonic vibration. The tone of pitch and harmonic additive is instrument. The violin and the flute, in other words, even if the same pitch (pitch), tone will also have different performance.
Low frequency
From 40 hz - 80 hz frequency known as the low frequency. What does this spectrum instrument? Drums, bass, cello, bass bassoon, bassoon, bass extension number, bass clarinet, mediating, French horn, etc. This band is progressed to form powerful low frequency basis. In general, the average person will the frequencies that are extremely low frequency, because it sounds really already very low. If the quantity of the spectrum are too few, plump surging feelings must not; And can lead to high frequency, high frequency of outstanding, make sound lose balance, not durable.
In the low frequency
From 80 hz - 80 hz, I called in the low frequency. The spectrum is the most headache of a Taiwan acoustics fan, because it is a magnificent and likelihood of ears. Why this frequency band is especially easy to have a peak? With the small room of length, width and height size. Most of the people in order to remove the annoying peak, made efforts to absorb the spectrum, the ears are not interesting. Unfortunately, when your ears sounds not magnificent and yet, the low frequency and intermediate frequency above to below I'm afraid I have with the absorption of low frequency and went into a state of depression, and makes the sound thin, the lack of a rich feeling. Unfortunately most of the people more because peak disappear and think this is right. This is one of the reasons many people home voice not rich enough. The spectrum of instruments including the mentioned just now in the low frequency instrument. By the way, timpani and bass also want to add to.
Intermediate frequency
Across three octaves from 160 hz - 1280 hz (320 hz and 640 hz and 640 hz) between the frequency of I called intermediate frequency. The spectrum almost encompassing all Musical Instruments, vocals, so is the most important band. Readers are the biggest misconception about instrument range took place here. Much of the violin range in this band, for example, but ordinary people think it is very high; Don't think soprano range is very high, in general, the summit of her vocal range just also in intermediate frequency limit.
From the description above, you must also know how important it is to this period of intermediate frequency on the stereo. As long as the frequency of sag, the performance of the voice immediately. Sometimes, the thin is easy to be interpreted as "fake cohesion". I believe that there are so many audio fans are all in the case of the intermediate frequency sag and don't even know it. The significance of this band can also from the second speaker crossover point to analyze. Generally two sound way loudspeaker crossover point around 2500 hz and 3000 hz, that is to say, more than 2500 hz by high monomer, 2500 hz by bass in the monomer. This 2500 hz is about 1280 hz 2 times, that is to say, for fear of bass monomer in the intermediate frequency limit in too much of a crossover point distortion, designers have to increase the frequency division point to intermediate frequency limit twice, so that the most perfect intermediate frequency can be made by the bass monomer. What if this statement is correct, the high monomer for? If you've ever will ears close to the high monomer, you will hear a piece of "hiss" sound, that is most of the harmonics. If there is no high monomer were hissing sound, bass in a monomer to sing music alone, it must be dark. Of course, if it is the third road design of the horn, the intermediate frequency most will be included in the mediant monomer.
In the high frequency
From the 1280 hz - 2560 hz is called high frequency. What does this spectrum instrument? About a quarter of the high range in the violin, the viola in the ceiling, higher range, flute, clarinet, oboe, piccolo lower half of the range, the cymbals, Angle iron, etc. Please note that the trumpet is not in the frequency domain. Actually in the high frequency easy to recognize, as long as the string of high range and woodwind range is in high frequency. This band a lot of people will think is high frequency, so please pay special attention.
High frequency
From 2560 hz - 5120 hz this Duan Pin domain, I call it a high frequency. This Duan Pin domain for instruments, are rarely involved. Because in addition to the upper limit of the range of a violin, piano, piccolo high range, most of the rest of the instrument will not appear in the spectrum. From crossover points of the horn, we can find this Duan Pin domain all appeared in the high monomer. As I said, when you will ear near the high monomer, you can hear the sound of the of not playing musical instrument, but a hiss. From the performance of high monomer, can once again proved that high monomer rarely a musical instrument or vocal pitch, it's just a pitch of high power harmonic.
Extremely high frequency,
From 5120 hz - 20000 hz so wide frequency band, I call the extremely high frequency. You can from the high frequency is the fact that few instruments, learned that hold by extremely high frequency harmonic with vocals and instruments. General instrument partials are mostly high energy small probability, in other words, to make a very sharp, high-pitched monomer can clearly regeneration is very subtle. From here, a troubled horn monomer made things happened, how it is to the best of both worlds? "What is" be satisfactory? You ever think, if a high monomer to clear all slight overtone regeneration, in spite of all the design into small current can promote the diaphragm, then by the same high monomer is responsible for the high frequency and medium frequency power will most likely is in a state of distortion, often because of these two energy spectrum than extremely high frequency, big too much. That is currently on the market many speakers extremely high frequency, it is clear that one of the reasons is easy to become sharp.
Do you remember the previous Spentdor
SP - 1 the horn? It is the third road design, the third way? Bass monomer, high monomer, ultra high monomer in three way. The ultra high monomer is responsible for more than 13000 hz frequency. I remember there are a lot of people are "confused", why SP - 1 has a super high monomer, and voice is so soft? Should be very sharp! I think you should get to know now!!!! SP - 1 design focus is on the high monomer not distortion, and can reproduce extremely high frequency. That sounds very comfortable, this is SP - 1 has one of the reasons for the musical.
To understand the segmentation method of high, medium and low frequency band, then we will discuss the "control" amount of sense. Volume sense refers to the amount of quantity, of course, that is we said: the high is more less, bass, etc. And control more often referred to as "the control of low frequency and high frequency band". Some equipment low-frequency loose, some elastic. We would say that the latter has a low frequency control. Some equipment can catch lived high frequency, let it not up to the ear, we said it high frequency control. Please note that the amount of volume feeling does not represent a spectrum equipment real good or bad, equipment between quantity depends on the feeling of mutual collocation is important. And the stand or fall of control is the equipment itself, the better.
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