Low frequency room excitation using distributed mode loudspeakers
Fazenda, BM, Avis, MR and Davies, WJ 2002, Low frequency room excitation using distributed mode loudspeakers , in: 21st Audio Engineering Society Convention, 1-3 June 2002, Saint Petersburg, Russia.
Download (333kB) | Preview
Conventional pistonic loudspeakers excite the modes of an enclosed sound field in such a way as to introduce modal artefacts which may be problematic for listeners to high-quality reproduced sound . Their amelioration may involve the use of highly space-consumptive passive absorptive devices or active control techniques [eg 2,3,4]. Other approaches have concentrated on the design of the driver used to excite the room. Distributed sources ranging from the dipole  to more complex configurations  may be expected to interact with the room eigenvectors in a complicated manner which may be optimised in terms of the spatial and frequency-domain variance of the soundfield. Recent interest in distributed sources has centred on the Distributed Mode Loudspeaker (DML), and this paper reports an investigation into the interaction of DMLs with modal soundfields. It is shown that large DMLs may be expected to modify the low-frequency soundfield. Producing useful low-frequency control remains difficult but may be achieved in some circumstances.
|Item Type:||Conference or Workshop Item (Paper)|
|Themes:||Subjects / Themes > Q Science > QC Physics > QC221-246 Acoustics - Sound|
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering|
Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Acoustics Research Centre
|Journal or Publication Title:||Proceedings of 21st Audio Engineering Society Convention|
|Depositing User:||BM Fazenda|
|Date Deposited:||09 Jul 2010 12:31|
|Last Modified:||27 Sep 2011 12:29|
Document DownloadsMore statistics for this item...
Actions (login required)
|Edit record (repository staff only)|