PMID- 25234981
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20150519
LR  - 20140919
IS  - 1520-8524 (Electronic)
IS  - 0001-4966 (Linking)
VI  - 135
IP  - 4
DP  - 2014 Apr
TI  - Two dimensional sound field reproduction using higher order sources to exploit 
      room reflections.
PG  - 1820-33
LID - 10.1121/1.4868376 [doi]
AB  - In this paper, sound field reproduction is performed in a reverberant room using 
      higher order sources (HOSs) and a calibrating microphone array. Previously a 
      sound field was reproduced with fixed directivity sources and the reverberation 
      compensated for using digital filters. However by virtue of their directive 
      properties, HOSs may be driven to not only avoid the creation of excess 
      reverberation but also to use room reflection to contribute constructively to the 
      desired sound field. The manner by which the loudspeakers steer the sound around 
      the room is determined by measuring the acoustic transfer functions. The 
      requirements on the number and order N of HOSs for accurate reproduction in a 
      reverberant room are derived, showing a 2N + 1-fold decrease in the number of 
      loudspeakers in comparison to using monopole sources. HOSs are shown applicable 
      to rooms with a rich variety of wall reflections while in an anechoic room their 
      advantages may be lost. Performance is investigated in a room using extensions of 
      both the diffuse field model and a more rigorous image-source simulation method, 
      which account for the properties of the HOSs. The robustness of the proposed 
      method is validated by introducing measurement errors.
FAU - Betlehem, Terence
AU  - Betlehem T
AD  - Callaghan Innovation, P.O. Box 31-310, Lower Hutt 5010, New Zealand.
FAU - Poletti, Mark A
AU  - Poletti MA
AD  - Callaghan Innovation, P.O. Box 31-310, Lower Hutt 5010, New Zealand.
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Acoust Soc Am
JT  - The Journal of the Acoustical Society of America
JID - 7503051
EDAT- 2014/09/23 06:00
MHDA- 2014/09/23 06:01
CRDT- 2014/09/20 06:00
PHST- 2014/09/20 06:00 [entrez]
PHST- 2014/09/23 06:00 [pubmed]
PHST- 2014/09/23 06:01 [medline]
AID - 10.1121/1.4868376 [doi]
PST - ppublish
SO  - J Acoust Soc Am. 2014 Apr;135(4):1820-33. doi: 10.1121/1.4868376.