Variations in “adequate” own-voice level used by speakers and preferred by listeners when communicating across a distance
Abstract
This paper describes a follow-up study to two pilot experiments on hearing-aid users’ ability to control the level of their own voice. In particular, the role of the so-called intervener in the experiments was examined. The intervener’s task is to supervise the speakers into speaking at the adequate level for the occasion. The study reveals that there are indeed differences among interveners, but that in broad terms the variation among interveners is similar in magnitude to the individual intervener’s test-retest consistency. Also the test-retest consistency of the speakers was examined, and was found to be similar to the aforementioned intervener-variations. The between-speaker variation is about twice as large, though. This suggests that it is highly necessary to include several speakers in experiments on own-voice level control, whereas relying on a single intervener is only mildly problematic.
References
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Laugesen, S., Nielsen, C., Maas, P., and Jensen, N.S. (2006). “Effects of amplification variations on vocal level and own-voice sound quality of hearing-aid users,” Podium presentation at IHCON, Lake Tahoe, USA.
Nielsen, C., and Laugesen, S. (2004). “Why own voice is different,” Instructional Course presented at the American Academy of Audiology Convention, Salt Lake City, USA.
Wang, L. M., Rathsam, J., Christensen, C. L., and Rindel, J. H. (2005). “Sound-pressure level distribution in a long, narrow hallway: Measurements versus results from a computer model with scattering from surface roughness and diffraction,” J. Acoust. Soc. Am., 118, 1998.
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