Source distance determination based on the spherical harmonics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F17%3A00307534" target="_blank" >RIV/68407700:21230/17:00307534 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ymssp.2016.09.015" target="_blank" >http://dx.doi.org/10.1016/j.ymssp.2016.09.015</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ymssp.2016.09.015" target="_blank" >10.1016/j.ymssp.2016.09.015</a>
Alternative languages
Result language
angličtina
Original language name
Source distance determination based on the spherical harmonics
Original language description
This paper deals with the processing of signals measured by a spherical microphone array, focusing on the utilization of near-field information of such an array. The processing, based on the spherical harmonics decomposition, is performed in order to investigate the radial-dependent spherical functions and extract their argument – distance to the source. Using the low-frequency approximation of these functions, the source distance is explicitly expressed. The source distance is also determined from the original equation (using no approximation) by comparing both sides of this equation. The applicability of both methods is first presented in the noise-less data simulation, then validated with data contaminated by the additive white noise of different signal-to-noise ratios. Finally, both methods are tested for real data measured by a rigid spherical microphone array of radius 0.15 m, consisting of 36 microphones for a point source represented by a small speaker. The possibility of determination of the source distance using low-order spherical harmonics is shown.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10307 - Acoustics
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Mechanical Systems and Signal Processing
ISSN
0888-3270
e-ISSN
—
Volume of the periodical
85
Issue of the periodical within the volume
FEB
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
993-1004
UT code for WoS article
000389095400065
EID of the result in the Scopus database
2-s2.0-84995528358