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Auditory Perception, Speech Communication, and Source Localization in Adverse Environments


711 Human Performance Wing, RHC/Decision Making Division

RO# Location
13.15.07.B5700 Wright-Patterson AFB, OH 454337542


Name E-mail Phone
Iyer, Nandini 937.255.4381


Auditory perception is an amazingly complex modality capable of extracting spatial, spectral, and temporal information from multiple simultaneous sound sources even in adverse listening environments. However, most real-world audio display systems rely on relatively simple stimuli that fail to take full advantage of the inherent capabilities of human listeners. The goal of this research is to find ways to increase the amount of information transferred to listeners through audio display systems. The effort involves three broad areas of research. The first area focuses on the generation of robust and intuitive azimuth, elevation, and distance cues that maximize the transfer of spatial information in audio displays, especially in noisy environments that involve more than one virtual sound source. These displays might also include man-portable augmented reality systems that dismounted soldiers could use without losing awareness of their surrounding environments. The second area focuses on improving the segregation of competing sound sources in complex listening environments, especially those that involve more than one simultaneous speech signal. A major component of this research is a study of the role that non-energetic “informational” masking plays in the perception of multiple speech signals. The third area of the masking functions is derived using natural sounds in different complex soundscapes. All three areas will employ traditional psychophysical as well as signal detection theory and methods.



Iyer N, Brungart D, Simpson B: Journal of the Acoustical Society of America 128(5): 2998, 2010

Hoglund E, et al: Journal of the Acoustical Society of America 128(1): 164, 2010


Informational masking; Energetic masking; Speech segregation; Cocktail party; Sound localization; Auditory perception; Auditory streaming; Audio displays; Hearing protection;


Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants
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