【 Weak current College 】 Equalizer overview---Power By 【 China power house network 】

-Overview

Equalizer can be used to enhance or diminish a band on the signal in order to achieve the purpose of the change in tone. How much of the increase or decrease is decibels (dB). Equalizer can you put a tone of annoying harmonic constituents to reduce, avoid final mix in conflicts between various sounds. Suppose you behind the voice singing with a rhythmic piano, piano and human voice is in the same band, and conflicts occurred. When the solution is to lower the piano voice: in the band's composition, drag the band to the human voice.

-Working principle

Equalizer using a filter circuit, this circuit can signal spectrum in certain parts of the deaf (through), but on other parts of hoisting or lower.

Commonly used filter is mainly there are four types:

Low-pass filters (lowpass), its purpose is to make the below a certain frequency of the signal passed, and the composition of the above this frequency, the attenuation by specific frequency we call cut-off frequency (cutofffrequency);

High-pass filter (highpass), its purpose is to enable higher than the cutoff frequency of the signal passed, and the composition of the below this frequency be attenuation;

Bandpass filter (bandpass), its purpose is to enhance a particular frequency signal in the vicinity, and ignore the high and low frequency components, including the specific frequency we call center frequency (centerfrequency);

Band-stop filters (notch), its use is to attenuate the signal in the vicinity of the Centre frequency and ignore too high and low frequency components.

Band-pass and band-stop filter you can make the effect of frequency range called bandwidth (bandwidth).

There are many kinds of equalizer is available for our use, even in the most weak mixer can be seen. This is typically the cut-off frequency above or below the signal for lifting or lowering of the high pass and low pass equalizer. Cutoff frequency is adjustable, itmay also be fixed. Graphic Equalizer (graphicequalizer) is using a lot of band-pass filter frequency spectrum of the audio signal into many pieces such that it can be adjusted separately for each band.

There is also a parametric equalizer (parametricequalizer), it is a remarkable tone adjustment form. Different from the graphic equalizer only relatively fixed band raised and lowered, parametric equalizer can be on the full range of frequencies on.

In addition, the parametric equalizer, bandwidth value is variable, lenient to narrow to. takes note of another standard parametric equalizer (sometimes also known as half-parametric equalizer), and parametric equalizer difference is only the center frequency and upgrading, attenuation of control, but you cannot adjust the bandwidth.

-Important parameters

Frequency (frequency): set you want to make the voice band Equalization of specific frequency bands.

Upgrade (boost) and decay (cut) parameters: determines you want on the selected frequency band for upgrading or attenuation.

Bandwidth, resonance or q-value parameters: this parameter determines the upgrade or attenuation curve is narrow and sharp, or the wide, flat. Narrower bandwidth settings (i.e. higher resonance or Q value) makes the equalizer only very narrow an audio segment, and wide set value can wide audio segment.

-Disturbing properties

Many have no Equalizer through switch (bypass), this comparison by Equalizer signals and not through the equalizer signal difference brought trouble. Some of the equalizer has an adjustable bandwidth, but this parameter is always on for use are not too narrow or too wide.

-Key points

If you can, it's best to use attenuation function instead of the upgrade. For example, we are generally conducted on band attenuation, rather than on the low frequency and high frequency bands for promotion. You can make the attenuation, then the entire frequency range of the whole.

· To continue on through the equalizer sound and fails the equalizer sound. You must not make such mistakes: you had a higher frequency band than the more elevated, but found the bass seem a bit thin, so he also enhance the low frequency band for, and then found a weakness in the band, but also on the increase in the frequency bands will also be so incessant manner.

· Always use you need a minimum amount of balance. Want to know are just a few dB difference results in very big changes.