equalizer types
TRANSCRIPT
The concept of gainIt is usually measured in dB
Positive dB = increment in signal’s energy
Zero dB = No change (unity gain)
Negative dB = decrement in signal’s energy
Infinite dB = Complete attenuation
Interesting facts of dB’s
0 dB means “no change” in the signal
1 dB change is barely heard by some people
3 dB is the minimum perceived change of loudness for most people
10 dB change sounds twice as loud
Graphic EQIt has a fixed number of bands (frequency ranges)
Each band has ist own gain control and fixed bandwidth
10 bands are ok for music adjustments
31 bands are standard for PA systems adjustment
Graphic EQ response9-band GEQ
Each band has its own gain control (+/- dB)
The bandwidth of each band is fixed
It is good for general equalization, but it is limited for professional audio production
Shelving EQ
Also known as Bass and Treble controls
They change the hi and low end of the range
The control a very wide bandwidth
It can’t control specific frequencies
Parametric EQ
It is the most complete equalizer
It can control three parameters:
Central frequency
Gain (boost or cut)
Q (bandwidth)