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Improving Infrared Spectroscopy Characterization of Soil Organic Matter with Spectral Subtractions

Improving Infrared Spectroscopy Characterization of Soil Organic Matter with Spectral Subtractions

Published on: January 10, 2019

Spectral manipulation improves elevation perception with non-individualized head-related transfer functions.

Vani G Rajendran¹, Hannes Gamper²

¹Department of Biomedical Sciences, City University of Hong Kong, 31 To Yuen Street, Kowloon Tong, Hong Kongvrajendr@cityu.edu.hk.

The Journal of the Acoustical Society of America

|May 10, 2019

Summary

Digital audio effects can improve 3D sound localization in virtual reality. Applying these effects to generic head-related transfer functions (HRTFs) enhances vertical plane sound perception, even without personalized HRTFs.

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Area of Science:

Acoustics
Virtual Reality Audio
Psychoacoustics

Background:

Immersive audio in virtual reality (VR) relies on spatial sound rendering using head-related transfer functions (HRTFs).
Accurate elevation perception is difficult with generic, non-personalized HRTFs.

Purpose of the Study:

To investigate if digital audio effects can enhance sound localization in the vertical plane when using generic HRTFs.
To determine if audio effects can improve elevation perception in VR audio.

Main Methods:

Digital audio effects were applied to a standard set of generic HRTFs.
Participants' sound localization in the vertical plane was evaluated.
Correlation between spectral energy and perceived elevation was analyzed.

Main Results:

Several tested digital audio effects significantly improved participants' elevation judgment.
Variability in spectral energy (2-10 kHz) strongly correlated with perceived sound elevation.
Audio effects offer a viable method to enhance elevation perception.

Conclusions:

Digital audio effects show promise for improving elevation perception in VR audio.
This approach can compensate for the lack of personalized HRTFs.
Spectral energy cues are crucial for vertical sound localization.