Skip to main content
Article thumbnail
Location of Repository

Low frequency room excitation using\ud Distributed Mode Loudspeakers

By Bruno Fazenda, M.R. Avis and W.J. Davies

Abstract

Conventional pistonic loudspeakers excite the modes of an enclosed sound field in such a way as to introduce modal\ud artefacts which may be problematic for listeners to high-quality reproduced sound [1]. Their amelioration may\ud involve the use of highly space-consumptive passive absorptive devices or active control techniques [eg 2,3,4].\ud Other approaches have concentrated on the design of the driver used to excite the room. Distributed sources ranging\ud from the dipole [5] to more complex configurations [6] may be expected to interact with the room eigenvectors in a\ud complicated manner which may be optimised in terms of the spatial and frequency-domain variance of the\ud soundfield. Recent interest in distributed sources has centred on the Distributed Mode Loudspeaker (DML), and this\ud paper reports an investigation into the interaction of DMLs with modal soundfields. It is shown that large DMLs\ud may be expected to modify the low-frequency soundfield. Producing useful low-frequency control remains difficult\ud but may be achieved in some circumstances

Topics: TA, QC
Year: 2002
OAI identifier: oai:eprints.hud.ac.uk:3545

Suggested articles

Citations

  1. (1996). A Technical White Paper – A Brief Overview’,
  2. (1995). Active Control of Sound’, doi
  3. (1987). al,’The active minimization of harmonic enclosed sound fields, Part II: A computer simulation’, doi
  4. (1954). B.,’The vibration of rectangular plates’, doi
  5. (1997). Boundary Interaction of Diffuse Field Distributed-Mode Radiators’,
  6. Diffuse Field Distributed Mode Radiators and their associated Early Reflections’,
  7. (2001). IIR biquad controllers for low frequency acoustic resonance',
  8. (2000). Modelling DML panels using classical theory’,
  9. (1996). Room mode excitation of dipolar and monopolar low frequency sources’,
  10. (2000). The active control of low frequency room modes', PhD Thesis,
  11. (2001). The views of Recording Studio Control Room users’,
  12. (1996). Time Frequency Response of a Room with Active Acoustic Absorption',
  13. (1948). Vibration and Sound', doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.