Small enclosures are characterized by peculiar acoustical properties, which sometimes need to be corrected. Since the impulse responses taken in different positions of a small room exhibit common characteristics ascribing to the physical parameters of the enclosure-in particular some peaks in the low frequency spectra-an effective correction can be realized, making use of an equalizer which processes the music or speech signal during its travel along the reproduction chain. In this paper, an efficient yet versatile equalizer for small rooms, simple enough to run in real-time, is presented. It is based on the common acoustical poles model, focused on the low-frequency range and cascaded with a conditioning stage.
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