Time Based Room Correction System for Low Frequencies Using Multiple Loudspeakers

Celestinos A, Nielsen SB. Time Based Room Correction System for Low Frequencies Using Multiple Loudspeakers. In: AES Conference: 32nd International Conference. Audio Engineering Society; 2007. Paper 19. Available from: https://aes.org/publications/elibrary-page/?id=14215

@inproceedings{Celestinos2007_14215,
  author = {Celestinos, Adrian and Nielsen, Sofus Birkedal},
  title = {{Time Based Room Correction System for Low Frequencies Using Multiple Loudspeakers}},
  booktitle = {AES Conference: 32nd International Conference},
  note = {Paper 19},
  year = {2007},
  month = sep,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=14215}
}

TY  - CPAPER
TI  - Time Based Room Correction System for Low Frequencies Using Multiple Loudspeakers
AU  - Celestinos, Adrian
AU  - Nielsen, Sofus Birkedal
T2  - AES Conference: 32nd International Conference
M1  - Paper 19
PY  - 2007
DA  - 2007/09/06
UR  - https://aes.org/publications/elibrary-page/?id=14215
PB  - Audio Engineering Society
LA  - en
AB  - Improving sound from loudspeakers in a room is a big issue. We are facing a rather complicated and serious problem, as one can experience very big variations in sound pressure level - up to 30 dB - in a room, especially at low frequencies. An innovative way of looking at the problem in the time-domain by the construction of a finite-difference time-domain approximation program (FDTD) has lead to a novel and simple solution also working in the time-domain called Controlled Acoustically Bass System (CABS). Working in the time-domain CABS includes additional cancelling loudspeakers at the back wall in order to remove the back wall reflection. The system has first been simulated with surprisingly good results and later implemented maintaining good performance. CABS is able to give a homogeneous sound pressure level in the whole room at low frequencies. A DSP system consisting of both hardware and software has been made from scratch for further development of CABS.
ER  -