Spatially extended sound equalisation in rooms

  • Orozco, Arturo (Project Manager)

Project Details


The motivation of this PhD project is the fact that sound reproduced in a normal listening room undergoes a spectral colouration, which is an undesirable effect. The objective of the work has been to study the extent to which sound can be reproduced without spatial fluctuations and spectral colouration in a region in a room as large as possible, over a frequency range as large as possible, and using as few loudspeakers as possible.
The problem has been studied theoretically using computer simulations, both in the frequency domain approach and with a time domain approach. Experiments in a flat (two-dimensional) enclosure have also been carried out.
One of the conclusions of the study is that it is a much better strategy to generate a plane travelling wave than to try to obtain the same response in ampliture and phase; the equalised region can be larger and the frequency range can be wider. For example it has been shown that a plane wave travelling in a certain direction can be generated in a room of 2.9x3.6x2.5 m at frequencies up to 320 Hz by using 32 loudspeakers.
Supervisor: Finn Jacobsen
Effective start/end date01/09/1996 → …


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