Threshold of increasing/decreasing tones

[Stefan Kerber <kerber@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Dear list

I am trying to determine masked threshold by the following procedure:
Subjects hear a masking noise in which a tone linearly increases/decreases
in level. The task of the subjects is to press a button when they first hear
/ no more hear the tone. Out of this response I try the calculate masked
threshold and compare it to thresholds determined by usual procedures.
Now my questions: Is anybody on the list aware of work which deals with the
masked threshold of in level increasing / decreasing tones? Are there some
studies which followed a similar approach? Is anybody aware of effects due
to the direction of level change, especially can a lowered threshold for
decreasing tones be caused by some kind of "continuity" or "priming" effect?

Thanks in advance
Stefan Kerber



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Stefan Kerber
Lehrstuhl für Mensch Maschine Kommunikation
AG Technische Akustik
Technische Universität München

Adress: Arcisstr. 21, 80290 München
Phone: +49 (0)89 289-28539
Fax:   +49 (0)89 289-28535
Home: http://www.mmk.ei.tum.de/~kes
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