Binaural reproduction aims at recreating a realistic audio scene at the ears of the listener using headphones. In the real acoustic world, sound sources tend to be externalized (that is, perceived to be emanating from a source out in the world) rather than internalized (that is, perceived to be emanating from inside the head). Unfortunately, several studies report a collapse of externalization, especially with frontal and rear virtual sources, when listening to binaural content using non-individualized Head-Related Transfer Functions (HRTFs). The present study examines whether or not head movements coupled with a head tracking device can compensate for this collapse. For each presentation, a speech stimulus was presented over headphones at different azimuths, using several intermixed sets of non-individualized HRTFs for the binaural rendering. The head tracker could either be active or inactive, and the subjects could either be asked to rotate their heads or to keep them as stationary as possible. After each presentation, subjects reported to what extent the stimulus had been externalized. In contrast to several previous studies, results showed that head movements can substantially enhance externalization, especially for frontal and rear sources, and that externalization can persist once the subject has stopped moving his/her head.
References
1.
Baskind
, A.
, Carpentier
, T.
, Noisternig
, M.
, Warusfel
, O.
, and Lyzwa
, J. M.
(2012
). “Binaural and transaural spatialization techniques in multichannel 5.1 production
,” in 27th Tonmeistertagung, VDT International Convention
.2.
Begault
, D. R.
(1992
). “Perceptual effects of synthetic reverberation on three-dimensional audio systems
,” J. Audio Eng. Soc.
40
, 895
–904
.3.
Begault
, D. R.
, and Wenzel
, E. M.
(1993
). “Headphone localization of speech
,” Hum. Fac. Erg. Soc.
35
, 361
–376
.4.
Begault
, D. R.
, Wenzel
, E. M.
, and Anderson
, M. R.
(2001
). “Direct comparison of the impact of head tracking, reverberation, and individualized head-related transfer functions on the spatial perception of a virtual speech source
,” J. Audio Eng. Soc.
49
, 904
–916
.5.
Blauert
, J.
(1971
). “Localization and the law of the first wavefront in the median plane
,” J. Acoust. Soc. Am.
50
, 466
–470
.6.
Blauert
, J.
(1997
). Spatial Hearing: The Psychophysics of Human Sound Localization
(MIT Press
, Cambridge, MA
), pp. 222
–224
.7.
Boyd
, A. W.
, Whitmer
, W. M.
, Soraghan
, J. J.
, and Akeroyd
, M. A.
(2012
). “Auditory externalization in hearing-impaired listeners: The effect of pinna cues and number of talkers
,” J. Acoust. Soc. Am.
131
, EL268
–EL274
.8.
Brimijoin
, W. O.
, Boyd
, A. W.
, and Akeroyd
, M. A.
(2013
). “The contribution of head movement to the externalization and internalization of sounds
,” PloS One
8
, e83068
.9.
Carlile
, S.
, and Leung
, J.
(2016
). “The perception of auditory motion
,” Trends Hear.
20
, 1
–19
.10.
Durlach
, N. I.
, Rigopulos
, A.
, Pang
, X. D.
, Woods
, W. S.
, Kulkarni
, A.
, Colburn
, H. S.
, and Wenzel
, E. M.
(1992
). “On the externalization of auditory images
,” Presence-Teleop. Virt.
1
, 251
–257
.11.
Haas
, H.
(1949
). “The influence of a single echo on the audibility of speech
,” J. Audio Eng. Soc.
20
, 145
–159
[English translation (1972)].12.
Hartmann
, W. M.
, and Wittenberg
, A.
(1996
). “On the externalization of sound images
,” J. Acoust. Soc. Am.
99
, 3678
–3688
.13.
Katz
, B. F.
, and Parseihian
, G.
(2012
). “Perceptually based head-related transfer function database optimization
,” J. Acoust. Soc. Am.
131
, 99
–105
.14.
Kawaura
, J. I.
, Suzuki
, Y.
, Asano
, F.
, and Sone
, T.
(1991
). “Sound localization in headphone reproduction by simulating transfer functions from the sound source to the external ear
,” J. Acoust. Soc. Jpn.
12
, 203
–216
.15.
Kim
, C.
, Mason
, R.
, and Brookes
, T.
(2013
). “Head movements made by listeners in experimental and real-life listening activities
,” J. Audio Eng. Soc.
61
, 425
–438
.16.
Kim
, S. M.
, and Choi
, W.
(2005
). “On the externalization of virtual sound images in headphone reproduction: A wiener filter approach
,” J. Acoust. Soc. Am.
117
, 3657
–3665
.17.
König
, G.
, and Sussmann
, W.
(1955
). “Zum richtungshören in der median-sagittal-ebene” (“On directional hearing in the medial-saggital planes”)
, Eur. Arch. Oto-Rhino-Laryngol.
167
, 303
–307
.18.
Laws
, P.
, and Platte
, H. J.
(1975
). “Spezielle experimente zur kopfbezogenen stereophonie” (“some experiments in head-related stereophony”)
, in Fortschritte der Akustik, DAGA 75′, Physik-Verlag, Weinheim
, pp. 365
–368
.19.
Loomis
, J. M.
, Hebert
, C.
, and Cicinelli
, J. G.
(1990
). “Active localization of virtual sounds
,” J. Acoust. Soc. Am.
88
, 1757
–1764
.20.
Martin
, R. L.
, McAnally
, K. I.
, and Senova
, M. A.
(2001
). “Free-field equivalent localization of virtual audio
,” J. Audio Eng. Soc.
49
, 14
–22
.21.
Mendonça
, C.
, Campos
, G.
, Dias
, P.
, Vieira
, J.
, Ferreira
, J. P.
, and Santos
, J. A.
(2012
). “On the improvement of localization accuracy with non-individualized HRTF-based sounds
,” J. Audio Eng. Soc.
60
, 821
–830
.22.
Møller
, H.
, Sørensen
, M. F.
, Jensen
, C. B.
, and Hammershøi
, D.
(1996
). “Binaural technique: Do we need individual recordings?
,” J. Audio Eng. Soc.
44
, 451
–469
.23.
Nicol
, R.
, Gros
, L.
, Colomes
, C.
, and Messonnier
, J.-C.
(2016
). “Etude comparative du rendu de différentes techniques de prise de son spatialisée après binauralisation” (“comparative study of several spatial audio recording setups after binauralization”)
, in Proceedings of Acoustics 2016 Conference
, Le Mans, France.24.
Noble
, W.
(1987
). “Auditory localization in the vertical plane: Accuracy and constraint on bodily movement
,” J. Acoust. Soc. Am.
82
, 1631
–1636
.25.
Perrett
, S.
, and Noble
, W.
(1997
). “The contribution of head motion cues to localization of low-pass noise
,” Percept. Psychophys.
59
, 1018
–1026
.26.
Plenge
, G.
(1974
). “On the differences between localization and lateralization
,” J. Acoust. Soc. Am.
56
, 944
–951
.27.
Politis
, A.
, Laitinen
, M. V.
, Ahonen
, J.
, and Pulkki
, V.
(2015
). “Parametric spatial audio processing of spaced microphone array recordings for multichannel reproduction
,” J. Audio Eng. Soc.
63
, 216
–227
.28.
Rébillat
, M.
, Boutillon
, X.
, Corteel
, E.
, and Katz
, B. F.
(2012
). “Audio, visual, and audio-visual egocentric distance perception by moving participants in virtual environments
,” ACM Trans. Appl. Percept.
9
, 1
–17
.29.
Sakamoto
, N.
, Gotoh
, T.
, and Kimura
, Y.
(1976
). “On ‘out-of-head localization' in headphone listening
,” J. Audio Eng. Soc.
24
, 710
–716
.30.
Simon
, L.
, Zacharov
, N.
, and Katz
, B. F.
(2016
). “Perceptual attributes for the comparison of head-related transfer functions
,” J. Acoust. Soc. Am.
140
, 3623
–3632
.31.
Stitt
, P.
, Hendrickx
, E.
, Messonnier
, J. C.
, and Katz
, B.
(2016a
). “The influence of head tracking latency on binaural rendering in simple and complex sound scenes
,” in Proceedings of the 140th Convention of the Audio Engineering Society
, Vol. 9591
, pp. 1
–8
, paper no. 9591.32.
Stitt
, P.
, Hendrickx
, E.
, Messonnier
, J.-C.
, and Katz
, B. F.
(2016b
). “The role of head tracking in binaural rendering
,” in Tonmeistertagung TMT
, 350–355 (Verband Deutscher Tonmeister
, Cologne, Germany
).33.
Toole
, F. E.
(2008
). Sound Reproduction: Loudspeakers and Rooms
(Focal Press
, Burlington, MA
), pp. 98
–116
.34.
Warusfel
, O.
(2003
). “LISTEN HRTF database
,” http://recherche.ircam.fr/equipes/salles/listen/ (Last viewed February 7, 2017).35.
Wenzel
, E. M.
(1995
). “The relative contribution of interaural time and magnitude cues to dynamic sound localization
,” in IEEE Workshop on Applications of Signal Processing to Audio and Acoustics
, pp. 80
–83
.36.
Wenzel
, E. M.
, Arruda
, M.
, Kistler
, D. J.
, and Wightman
, F. L.
(1993
). “Localization using nonindividualized head-related transfer functions
,” J. Acoust. Soc. Am.
94
, 111
–123
.37.
Wersényi
, G.
(2009
). “Effect of emulated head-tracking for reducing localization errors in virtual audio simulation
,” IEEE Trans. Audio Speech Language Processing
17
, 247
–252
.38.
Wightman
, F. L.
, and Kistler
, D. J.
(1989
). “Headphone simulation of free-field listening. II: Psychophysical validation
,” J. Acoust. Soc. Am.
85
, 868
–878
.39.
Wightman
, F. L.
, and Kistler
, D. J.
(1999
). “Resolution of front-back ambiguity in spatial hearing by listener and source movement
,” J. Acoust. Soc. Am.
105
, 2841
–2853
.40.
Williams
, M.
(1991
). “Microphone arrays for natural multiphony
,” in Proceedings of the 91st Convention of the Audio Engineering Society
, paper no. 3157.41.
Williams
, M.
(2005
). “The whys and wherefores of microphone array crosstalk in multichannel microphone array design
,” in Proceedings of the 118th Convention of the Audio Engineering Society
, paper no. 6373.42.
Yairi
, S.
, Iwaya
, Y.
, and Suzuki
, Y.
(2007
). “Estimation of detection threshold of system latency of virtual auditory display
,” Appl. Acoust.
68
, 851
–863
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