The mid-difference hump in forward-masked intensity discrimination
Journal of the acoustical society of America. Bd. 123. H. 3. Woodberry, NY: American Inst. of Physics 2008 S. 1571 - 1581
Erscheinungsjahr: 2008
ISBN/ISSN: 0001-4966
Publikationstyp: Zeitschriftenaufsatz
Sprache: Englisch
Doi/URN: 10.1121/1.2837284
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Inhaltszusammenfassung
Forward-masked intensity-difference limens (DLs) for pure-tone standards presented at low, medium, and high levels were obtained for a wide range of masker-standard level differences. At a standard level of 25 dB SPL, the masker had a significant effect on intensity resolution, and the data showed a mid-difference hump: The DL elevation was greater at intermediate than at large masker-standard level differences. These results support the hypothesis that the effect of a forward masker on inten...Forward-masked intensity-difference limens (DLs) for pure-tone standards presented at low, medium, and high levels were obtained for a wide range of masker-standard level differences. At a standard level of 25 dB SPL, the masker had a significant effect on intensity resolution, and the data showed a mid-difference hump: The DL elevation was greater at intermediate than at large masker-standard level differences. These results support the hypothesis that the effect of a forward masker on intensity resolution is modulated by the similarity between the masker and the standard. For a given masker-standard level difference, the effect of the masker on the DL was larger for a 55-dB SPL than for the 25-dB SPL standard, providing new support for a midlevel hump. To examine whether the masker-induced DL elevations are related to masker-induced loudness changes [R. P. Carlyon and H. A. Beveridge, J. Acoust. Soc. Am. 93, 2886-2895 (1993)], the effect of the masker on target loudness was measured for the same listeners. Loudness enhancement followed a mid-difference hump pattern at both the low and the intermediate target level. The correlation between loudness changes and DL elevations was significant, but several aspects of the data are incompatible with the predicted one-on-one relation between the two effects. (C) 2008 Acoustical Society of America.» weiterlesen» einklappen
Klassifikation
DFG Fachgebiet:
Psychologie
DDC Sachgruppe:
Psychologie
Verknüpfte Personen
- Daniel Oberfeld-Twistel
- Mitarbeiter/in
(Allgemeine und Experimentelle Psychologie)