What does equalizer mean+12db+6db0db-6db-12db and so on?

The decibel of equalizer refers to decibel.

+12db+6db0db-6db-12db of the equalizer refers to the decibel of the corresponding frequency band, that is, the volume of each frequency band can be adjusted.

The+12db+6db0db-6db-12db decibel of the equalizer is also negative. If the power after a link is reduced by half, it is equal to10 * LG (2/1) =10 * (lg2/).

In decibel science, the most important thing is to remember the following three numbers:+3dB = 2 *; + 10dB = 10 *； 0dB = 1 *。

If 0dB is 1W, 3dB = 2w, 6DB = 4w, 9DB = 8W, 10dB = 10w, 12dB = 16W, 20dB =10.

When we increase the power by 1 times and the sound pressure by 3dB, do we feel that the volume is increased by 1 times? No. Because we have a wide range of hearing sensitivity, we can hear it from the minimum sound pressure of 0dBspl to 120dBspl.

(The power increase is 1000000000000 times, 1 trillion times), so we only feel that the volume has increased a little, not 1 times. Usually, the volume needs to be increased by 7- 10 decibels, so we feel that the volume has increased by 1 times.

Every time the power increases 1 times, it will increase by 3dB, and every time the voltage increases 1 times, it will increase by 6dB. The reason is that because of the square of the power volt, when the volt increases 1 times (2 *), the power increases to 4 times, which is equal to ++6dB. But usually as Andhadhun, they don't need to know how many times the voltage has increased, just how many times the power has increased.

If you think it's no big deal to add 3 decibels to the gain, it's actually wrong. Sometimes when the treble is not enough, it will be adjusted in the equalizer on the mixer. Usually, when the equalizer knob of each input is 0dB, the time of the position clock is 12 hours.

When he wants to raise the treble or bass, he turns the knob to the 3 o'clock position. Usually this position is ++9dB, which is equivalent to adjusting the original equalization frequency by 8 times. If the average output at this balanced frequency is 200W, after this adjustment, it means that the output of the power amplifier is1600 W.

Extended data:

Use of equalizer:

Wiring equipment for mixing input channels and mixers, for example, on the output line leading to speakers.

Although the use of equalizer in microphone input channel reminds us of its method of shaping the sound of speakers or musical instruments, the question that is often overlooked is whether an equalizer is needed, which may be a sign of errors in other links.

Equalization can be used to compensate for problems in audio link or speaker audio characteristics, microphone selection or studio acoustic influence. It may even appear in a recording studio with perfect acoustic characteristics, the latest speakers and the best microphones.

References:

Baidu encyclopedia-equalizer