Median plane sound localization using early head-related impulse response

Median plane sound localization using early head-related impulse response Previous studies reported that the outline of the spectral notches and peaks in the head-related transfer function (HRTF) in the frequency range above 5 kHz plays an important role in the perception of the vertical angle of a sound image. Moreover, the notches and peaks were reported to be generated in the pinna. These findings imply that the important information for the vertical localization is mostly included in the early part of the head-related impulse response (HRIR), because the response from the pinna arrives at the receiving point (the entrance of the ear canal) earlier than that from the torso. However, the duration of the HRIR required for accurate median plane localization is unclear. In the present study, we measured the HRIRs for seven target vertical angles in the upper median plane (0° to 180° in 30° steps) for five subjects and generated early HRIRs, the durations of which were 0.25, 0.5, 1, and 2 ms. We analyzed the amplitude spectra of the early HRIRs and performed two psycho-acoustical tests with regard to the vertical angle and the distance of a sound image. The results suggested that (1) the outline of the amplitude spectra of the early HRIRs of 1 and 2 ms was approximately the same as that of the full-length HRIR, whereas the outline of the amplitude spectra of the early HRIRs of 0.25 and 0.5 ms differed from that of the full-length HRIR, and (2) no statistically significant difference in the mean vertical localization error or in the scale value of the perceived sound image distance was observed between the full-length HRIR and each of the early HRIRs of 1 and 2 ms at any target vertical angle. These results suggest that the early HRIR of 1 ms includes information of the outline of the spectral notches and peaks with respect to physical aspect. Moreover, the results suggest that the early HRIR of 1 ms provides approximately the same vertical angle and distance of a sound image as the full-length HRIR in the upper median plane with respect to perceptual aspect. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Acoustics Elsevier

Median plane sound localization using early head-related impulse response

Loading next page...
 
/lp/elsevier/median-plane-sound-localization-using-early-head-related-impulse-a9bRJdem0q
Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier Ltd
ISSN
0003-682X
eISSN
1872-910X
D.O.I.
10.1016/j.apacoust.2018.03.027
Publisher site
See Article on Publisher Site

Abstract

Previous studies reported that the outline of the spectral notches and peaks in the head-related transfer function (HRTF) in the frequency range above 5 kHz plays an important role in the perception of the vertical angle of a sound image. Moreover, the notches and peaks were reported to be generated in the pinna. These findings imply that the important information for the vertical localization is mostly included in the early part of the head-related impulse response (HRIR), because the response from the pinna arrives at the receiving point (the entrance of the ear canal) earlier than that from the torso. However, the duration of the HRIR required for accurate median plane localization is unclear. In the present study, we measured the HRIRs for seven target vertical angles in the upper median plane (0° to 180° in 30° steps) for five subjects and generated early HRIRs, the durations of which were 0.25, 0.5, 1, and 2 ms. We analyzed the amplitude spectra of the early HRIRs and performed two psycho-acoustical tests with regard to the vertical angle and the distance of a sound image. The results suggested that (1) the outline of the amplitude spectra of the early HRIRs of 1 and 2 ms was approximately the same as that of the full-length HRIR, whereas the outline of the amplitude spectra of the early HRIRs of 0.25 and 0.5 ms differed from that of the full-length HRIR, and (2) no statistically significant difference in the mean vertical localization error or in the scale value of the perceived sound image distance was observed between the full-length HRIR and each of the early HRIRs of 1 and 2 ms at any target vertical angle. These results suggest that the early HRIR of 1 ms includes information of the outline of the spectral notches and peaks with respect to physical aspect. Moreover, the results suggest that the early HRIR of 1 ms provides approximately the same vertical angle and distance of a sound image as the full-length HRIR in the upper median plane with respect to perceptual aspect.

Journal

Applied AcousticsElsevier

Published: Oct 1, 2018

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off