PMID- 18177160
OWN - NLM
STAT- MEDLINE
DCOM- 20080129
LR  - 20080107
IS  - 1520-8524 (Electronic)
IS  - 0001-4966 (Linking)
VI  - 123
IP  - 1
DP  - 2008 Jan
TI  - The role of spectral modulation cues in virtual sound localization.
PG  - 302-14
LID - 10.1121/1.2804698 [doi]
AB  - Sound localization cues generally include interaural time difference, interaural 
      intensity difference, and spectral cues. The purpose of this study is to 
      investigate the important spectral cues involved in so-called head related 
      transfer functions (HRTFs) using a combination of HRTF analyses and a virtual 
      sound localization (VSL) experiment. Previous psychoacoustical and physiological 
      studies have both suggested the existence of spectral modulation frequency (SMF) 
      channels for analyzing spectral information (e.g., the spectral cues coded in 
      HRTFs). SMFs are in a domain related to the Fourier transform of HRTFs. The 
      relationship between various SMF regions and sound localization was tested here 
      by filtering or enhancing HRTFs in the SMF domain under a series of conditions 
      using a VSL experiment. Present results revealed that azimuth localization was 
      not significantly affected by HRTF manipulation. Applying notch filters between 
      0.1 and 0.4 cyclesoctave or between 0.35 and 0.65 cyclesoctave resulted in 
      significantly less accurate elevation responses at low elevations, while spectral 
      enhancement in these two SMF regions did not produce a significant change in 
      sound localization. Likewise, low-pass filtering at 2 cyclesoctave did not 
      significantly influence localization accuracy, suggesting that the major cues for 
      sound localization are in the SMF region below 2 cyclesoctave.
FAU - Qian, Jinyu
AU  - Qian J
AD  - Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania 
      19104, USA.
FAU - Eddins, David A
AU  - Eddins DA
LA  - eng
GR  - R01 DC04403/DC/NIDCD NIH HHS/United States
PT  - Journal Article
PT  - Research Support, N.I.H., Extramural
PL  - United States
TA  - J Acoust Soc Am
JT  - The Journal of the Acoustical Society of America
JID - 7503051
SB  - IM
MH  - Auditory Perception/*physiology
MH  - Cues
MH  - Humans
MH  - *Sound Localization
MH  - User-Computer Interface
EDAT- 2008/01/08 09:00
MHDA- 2008/01/30 09:00
CRDT- 2008/01/08 09:00
PHST- 2008/01/08 09:00 [pubmed]
PHST- 2008/01/30 09:00 [medline]
PHST- 2008/01/08 09:00 [entrez]
AID - 10.1121/1.2804698 [doi]
PST - ppublish
SO  - J Acoust Soc Am. 2008 Jan;123(1):302-14. doi: 10.1121/1.2804698.