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Home / News > Equalizer changes some of the notes in the use of audio signals


Equalizer changes some of the notes in the use of audio signals

Before you can use the equalizer to change the audio signal, you should think twice. Excessive use of corrections for the audience to listen to the overall effect may be pros and cons. Equalizer is not magical to be incredible, it has many shortcomings, and may have a deeper impact on the sound.

In the absence of corrections, the equalizer Beats Headphones Cheap was invented beats headphones in the 1830s to correct the lack of sound; its main use at the Hollywood film studio. Because of the support of an equalizer, now known as a fidelity filter, it has achieved very good results in terms of long distance loudspeakers, which contributes to its application and also to subsequent abuse. It is not surprising that several generations of sound engineers have little or no understanding of the effects of the equalizer on the sound, and the use of an equalizer in such a case is not satisfactory.

The equalizer is used to mix the mixer input channels and wiring devices, for example on an output line to the speaker. Although the use of an equalizer in the microphone input channel allows us to recall the method of shaping the loudspeaker sound or the sound of the instrument, the problem that is often overlooked is whether the equalizer may be a sign of the rest of the link.

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

The use of an equalizer in the output channel to the loudspeaker is a particularly interesting situation because it is easy to mistakenly solve all improper indoor acoustics and loudspeakers.

Parametric equalizer and graphic equalizer, the current use of two equalizers: parametric and graphical equalizer Figure 1 frequency multiplier measurement calibration curve. The upper curve is the total response of three filters at + 6dB, center frequencies of 630, 250 and 2500 Hz; the curve is the same multiplier filter set at + 2dB. The parametric equalizer is capable of correcting the sound signal while independently controlling the filter frequency, bandwidth and amplitude gain or attenuation. The frequency and peak amplitude or troughs in each frequency range can be adjusted continuously or stepwise using potentiometers and switches. The operator can adjust the 20: 1 frequency range while adjusting the sharpness or peak bandwidth, known as the quality factor (Q value), which is 0.29 to 5.0. In general, the highest and lowest frequency ranges can be switched from peak to flat form.

When such an equalizer is used to correct insufficient acoustic characteristics or loudspeaker tone characteristics, the operator may subjectively "through the human ear" or objectively use the audio analyzer to set the calibrator. The microphone of the analyzer acts on the sound waves at the measurement position, and the calibration pattern shape of the calibrator is set to be reversed with the measured shape so that the resulting characteristic curve is as linear Cheap Beats Headphones as possible. But all of this applies only to a point in space.

Since the operator's ear and the analyzer's microphone record the beats by dre wireless speaker's response curve at a certain location, this may cause problems when the operator moves to another location. All settings of the equalizer at a position are not suitable for any position except where this microphone is placed. In addition, in view of the complexity of the sound field in terms of sound standing waves and indoor resonance patterns, and the ratio of direct and reflected acoustic waves in one or more diffuse acoustic spaces, it is easy to understand the response to a slight improvement over a position, While the equilibrium of the problematic results in all other nearby locations is not as balanced. The human ear (the average distance of 19 cm) separated by the skull is very sensitive to the acoustic diffraction around the head so that we can sense the direction, intensity and time difference of direct and reflex acoustic waves. This is the "ears" hearing.

In addition to the use of the dummy head (the exact position of the microphone placed in the left and right ears), the stereo microphone or even the pair of stereo microphones will be fed to the analyzer and heard by the audience due to the subjective nature of the hearing Of the completely different objective data. Figure 2 is set in the +2, +4, +6, +8, +10 and +12 dB of the 1/3 frequency equalizer, measured calibration characteristic curve.

However, even with a simulation head and a measurement with a good subjective sense correction, it is worth remembering that any correction within a frequency range may depend on the type of equalizer in a much more or less extensive range Resulting in undesirable effects. Figures 1 and 2 show this. Obviously, the multiplier equalizer (Fig. 1) has a much wider correction characteristic than the 1/3-fold equalizer (Fig. 2). This is determined by the characteristics of the equalizer.

However, even if the 1/3 frequency equalizer has a fairly narrow characteristic when the calibrator is set to the highest position (+12 or +10 dB), they will have a wider range of features at + 4dB.

Therefore, it is important to use a calm mind, as rational as possible and logically balanced.