The ability of listeners to detect, identify, and monitor multiple simultaneous speech signals was measured in free field and virtual acoustic environments. Factorial combinations of four variables, including audio condition, spatial condition, the number of speech signals, and the sex of the talker were employed using a within-subjects design. Participants were required to detect the presentation of a critical speech signal among a background of non-signal speech events. Results indicated that spatial separation increased the percentage of correctly identified critical speech signals as the number of competing messages increased. These outcomes are discussed in the context of designing binaural speech displays to enhance speech communication in aviation environments.
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References
1.
BegaultD. R.PittmanM. T. (1996). Three-dimensional audio versus head-down traffic alert and collision avoidance system displays. The International Journal of Aviation Psychology, 6, 79–93.
2.
BegaultD. R.WenzelE. M. (1993). Headphone localization of speech. Human Factors, 35, 361–376.
3.
BoliaR. S.NelsonW. T. (in press). Spatial audio displays for target acquisition and speech communication. In HettingerL. J.HaasM. W. (Eds.), Psychological Issues in the Design and Use of Virtual Environments. Mahwah, NJ: Lawrence Erlbaum Associates, Inc.
4.
CrispienK.EhrenbergT. (1995). Evaluation of the “cocktail party effect” for multiple speech stimuli within a spatial auditory display. Journal of the Audio Engineering Society, 43, 932–941.
5.
EricsonM. A.McKinleyR. L. (1997). The intelligibility of multiple talkers separated spatially in noise. In GilkeyR. H.AndersonT. R. (Eds.), Binaural and spatial hearing in real and virtual environments. (pp. 701–724). Mahwah, NJ: Lawrence Erlbaum Associates.
6.
HancockP. A.ChignellM. H. (1988). Mental workload dynamics in adaptive interface design. IEEE Transactions on Systems, Man, and Cybernetics, 18(4), 647–657.
7.
HettingerL. J.CressJ. D.BrickmanB. J.HaasM. W. (1996). Adaptive interfaces for advanced airborne crew stations. Proceedings of the Third Annual Symposium on Human Interaction with Complex Systems (pp. 188–192). Los Alamitos, CA: IEEE Computer Society Press.
8.
McKinleyR. L.EricsonM. A.D'AngeloW. R. (1994). 3-dimensional auditory displays: Development, applications, and performance. Aviation, Space, and Environmental Medicine, May, 31–38.
9.
MooreT. J. (1981). Voice communication jamming research. AGARD Conference Proceedings 311: Aural Communication in Aviation (pp. 2:1–2:6). Neuilly-Sur-Seine, France.
10.
MoroneyB. W. (1999). An evaluation of unisensory and multisensory adaptive flight path navigation displays. Unpublished doctoral dissertation. University of Cincinnati, Cincinnati, Ohio.
11.
NelsonW. T.BoliaR. S.EricsonM. A.McKinleyR. L. (1998a). Monitoring the simultaneous presentation of multiple spatialized speech signals in the free filed. Proceedings of the 16th International Congress on Acoustics and the 135th Meeting of the Acoustical Society of America (pp. 2341–2342). Woodbury, NY: Acoustical Society of America.
12.
NelsonW. T.BoliaR. S.EricsonM. A.McKinleyR. L. (1998b). Monitoring the simultaneous presentation of spatialized speech signals in a virtual acoustic environment. Proceedings of the 1998 IMAGE Conference (pp. 159–166). Chandler, AZ: The IMAGE Society, Inc.
13.
PerrottD. R.CisnerosJ.McKinleyR. L.D'AngeloW. R. (1996). Aurally aided visual search under virtual and free field listening conditions. Human Factors, 38, 702–715.
14.
RicardG. L.MeirsS. L. (1994). Intelligibility and localization of speech from virtual directions. Human Factors, 36, 120–128.
15.
SimpsonB. D.BoliaR. S.EricsonM. A.McKinleyR. L. (1999). The effect of sentence onset asynchrony on call sign detection and message intelligibility in a simulated “cocktail party.”Journal of the Acoustical Society of America, 105, 1024.
16.
TannenR. S. (1999). Adaptive integration of helmet-mounted and spatialized auditory displays for target localization. Unpublished doctoral dissertation. University of Cincinnati, Cincinnati, Ohio.
17.
WenzelE. M. (1992). Localization in virtual acoustic displays. Presence, 1, 80–106.
18.
YostW. A.DyeR. H.SheftS. (1996). A simulated “cocktail party” with up to three sound sources. Perception & Psychophysics, 58, 1026–1036.
