Equalization can be an useful instrument to reduce excessive levels of room resonances. Equalization alters the overall frequency response of a room, therefore, it can be helpful to deliver a good bass to one listening position and at the same time making it worse for other listening positions in the room.
Equalization should be based on high-resolution measurements in order to reveal the effective room resonances. Because of performing steady-state measurements, equalization is only effective if applied in the low-frequency ranges.
The influence of the room on mid and high frequencies results into a time domain phenomena and cannot be revealed by steady-state measurements.
Effective frequencies in Equalization
The time domain phenomena for mid and high frequencies can be explained by their shorter wavelengths and hence the sophisticated interferences of direct and reflected sounds arriving at different times at different locations in the room.
A 1/3-octave graphic equalizer can be used to perform such equalization if a high resolution measurement was made and the revealed resonant frequency coincides with the center frequency of the 1/3 octave filter.
One has to consider that equalization can only address the peaks but will never compensate for the dips in the standing wave pattern.
In this post, we explained Equalization for active absorption; Other types of these methods that need to be mentioned to improve the sound will be published in future posts. These will pave the way for creating a home theater of the highest quality.
Although, we explored two types of sound absorbers that are effective in controlling sound reflections; Other types of these absorbers and the things that need to be mentioned to improve the sound will be published in future posts. These will pave the way for creating a home theater of the highest quality.