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Main Title: The Impact of the White Noise Gain (WNG) of a Virtual Artificial Head on the Appraisal of Binaural Sound Reproduction
Author(s): Rasumow, Eugen
Blau, Matthias
Hansen, Martin
Doclo, Simon
Par, Steven van de
Mellert, Volker
Püschel, Dirk
Type: Conference Object
Abstract: As an individualized alternative to traditional artificial heads, individual head-related transfer functions (HRTFs) can be synthesized with a microphone array and digital filtering. This strategy is referred to as "virtual artificial head" (VAH). The VAH filter coefficients are calculated by incorporating regularization to account for small errors in the characteristics and/or the position of the microphones. A common way to increase robustness is to impose a socalled white noise gain (WNG) constraint. The higher the WNG, the more robust the HRTF synthesis will be. On the other hand, this comes at the cost of decreasing the synthesis accuracy for the given sample of the HRTF set in question. Thus, a compromise between robustness and accuracy must be found, which furthermore depends on the used setup (sensor noise, mechanical stability etc.). In this study, different WNG are evaluated perceptually by four expert listeners for two different microphone arrays. The aim of the study is to find microphone array-dependent WNG regions which result in appropriate perceptual performances. It turns out that the perceptually optimal WNG varies with the microphone array, depending on the sensor noise and mechanical stability but also on the individual HRTFs and preferences. These results may be used to optimize VAH regularization strategies with respect to microphone characteristics, in particular self noise and stability.
Subject(s): ambisonics
sound field synthesis
spatial audio
Issue Date: 18-Mar-2014
Date Available: 18-Mar-2014
Is Part Of: 10.14279/depositonce-4103
Language Code: en
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Sponsor/Funder: BMBF, 17080X10,ViKK: Virtueller Kunstkopf
DFG, EXC 1077/1, Hören für alle: Modelle, Technologien und Lösungsansätze für Diagnostik, Wiederherstellung und Unterstützung des Hörens
Proceedings Title: Proceedings of the EAA Joint Symposium on Auralization and Ambisonics 2014
Publisher: Universitätsverlag der TU Berlin
Page Start: 175
Page End: 181
ISBN: 978-3-7983-2704-7
TU Affiliation(s): Fak. 1 Geistes- und Bildungswissenschaften » Inst. Sprache und Kommunikation » FG Audiokommunikation
Appears in Collections:Technische Universität Berlin » Publications

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