Abstract
The most important acoustic cues available to the brain for sound localization are produced by the interaction of sound with the animal's head and external ears. As a first step in understanding the relation between these cues and their neural representation in a vocal new-world primate, we measured head-related transfer functions (HRTFs) across frequency for a wide range of sound locations in three anesthetized marmoset monkeys. The HRTF magnitude spectrum has a broad resonance peak at 6-12 kHz that coincides with the frequency range of the major call types of this species. A prominent first spectral notch (FN) in the HRTF magnitude above this resonance was observed at most source locations. The center frequency of the FN increased monotonically from ∼12 to 26 kHz with increases in elevation in the lateral field. In the frontal field FN frequency changed in a less orderly fashion with source position. From the HRTFs we derived interaural time (ITDs) and level differences (ILDs). ITDs and ILDs (below 12 kHz) varied as a function of azimuth between ±250 μs and ±20 dB, respectively. A reflexive orienting behavioral paradigm was used to confirm that marmosets can orient to sound sources.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 96-108 |
| Number of pages | 13 |
| Journal | Hearing Research |
| Volume | 260 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Feb 2010 |
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Keywords
- (3-6) ITD
- HRTF
- ILD
- Marmoset behavior
- Sound localization
- Spectral notch
ASJC Scopus subject areas
- Sensory Systems
Cite this
Sound localization cues in the marmoset monkey. / Slee, Sean J.; Young, Eric D.
In: Hearing Research, Vol. 260, No. 1-2, 02.2010, p. 96-108.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sound localization cues in the marmoset monkey
AU - Slee, Sean J.
AU - Young, Eric D.
PY - 2010/2
Y1 - 2010/2
N2 - The most important acoustic cues available to the brain for sound localization are produced by the interaction of sound with the animal's head and external ears. As a first step in understanding the relation between these cues and their neural representation in a vocal new-world primate, we measured head-related transfer functions (HRTFs) across frequency for a wide range of sound locations in three anesthetized marmoset monkeys. The HRTF magnitude spectrum has a broad resonance peak at 6-12 kHz that coincides with the frequency range of the major call types of this species. A prominent first spectral notch (FN) in the HRTF magnitude above this resonance was observed at most source locations. The center frequency of the FN increased monotonically from ∼12 to 26 kHz with increases in elevation in the lateral field. In the frontal field FN frequency changed in a less orderly fashion with source position. From the HRTFs we derived interaural time (ITDs) and level differences (ILDs). ITDs and ILDs (below 12 kHz) varied as a function of azimuth between ±250 μs and ±20 dB, respectively. A reflexive orienting behavioral paradigm was used to confirm that marmosets can orient to sound sources.
AB - The most important acoustic cues available to the brain for sound localization are produced by the interaction of sound with the animal's head and external ears. As a first step in understanding the relation between these cues and their neural representation in a vocal new-world primate, we measured head-related transfer functions (HRTFs) across frequency for a wide range of sound locations in three anesthetized marmoset monkeys. The HRTF magnitude spectrum has a broad resonance peak at 6-12 kHz that coincides with the frequency range of the major call types of this species. A prominent first spectral notch (FN) in the HRTF magnitude above this resonance was observed at most source locations. The center frequency of the FN increased monotonically from ∼12 to 26 kHz with increases in elevation in the lateral field. In the frontal field FN frequency changed in a less orderly fashion with source position. From the HRTFs we derived interaural time (ITDs) and level differences (ILDs). ITDs and ILDs (below 12 kHz) varied as a function of azimuth between ±250 μs and ±20 dB, respectively. A reflexive orienting behavioral paradigm was used to confirm that marmosets can orient to sound sources.
KW - (3-6) ITD
KW - HRTF
KW - ILD
KW - Marmoset behavior
KW - Sound localization
KW - Spectral notch
UR - http://www.scopus.com/inward/record.url?scp=73649131907&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=73649131907&partnerID=8YFLogxK
U2 - 10.1016/j.heares.2009.12.001
DO - 10.1016/j.heares.2009.12.001
M3 - Article
VL - 260
SP - 96
EP - 108
JO - Hearing Research
JF - Hearing Research
SN - 0378-5955
IS - 1-2
ER -