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AW: Threshold of increasing/decreasing tones

I use tones which continuously increase / decrease in level. The tones
differ in the speed (from 3dB/sec to 15 dB/sec) with which level rises /
falls. The thing i observe is that thresholds get much more underestimated
for decreasing tones than they get overestimated by tones with rising level.
Thats why i am wondering if effects like priming or the continuity effect
could account for these differences.


-----Ursprüngliche Nachricht-----
Von: AUDITORY Research in Auditory Perception
[mailto:AUDITORY@xxxxxxxxxxxxxxx]Im Auftrag von Bernhard Laback
Gesendet: Donnerstag, 16. Februar 2006 12:07
An: AUDITORY@xxxxxxxxxxxxxxx
Betreff: Re: Threshold of increasing/decreasing tones

Dear Stefan,

Do you intend to use a continuous tone decreasing/increasing in level or
  to present sequences of short stationary tones, for which the level
decreases/increases from tone to tone.

These two situations are likely to differ with respect to the effects
referred to by John Neuhoff and Massimo Grassi.


Massimo Grassi wrote:

> Dear Stefan,
>> 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?
> there are few other references that might be interesting for you (see
> below).
> (1), (2) and (3) concerns subjective duration [(1) and (2) use sounds
> longer/much longer than 200-ms whereas (3) uses sounds of duration <
> 200-ms].
> (4) concerns loudness.
> 1) Grassi, M., Darwin, C. J. (in press). The subjective duration of
> ramped and
> damped sounds. Perception & Psychophysics. (ask me a draft if you need it)
> 2) Grassi, M. (2003). Differenza nella durata percettiva di suoni
> crescenti o
> calanti in intensità: permanenza o decurtamento? Giornale Italiano di
> Psicologia, 30, 659-663. (in English the title sounds like: "Subjective
> duration of ramped and damped sounds: ringing or echo?")
> 3) Schlauch, R. S., Ries, D. T., & DiGiovanni, J. J. (2001). Duration
> discrimination and subjective duration for ramped and damped sounds.
> Journal of
> the Acoustical Society of America, 109, 2880-2887.
> 4) Small, A. M. (1977). Loudness perception of signals monotonically
> changing
> sound pressure. Journal of the Acoustical Society of America, 61,
> 1293-1297.
> Ciao,
> m
> ********************
> Massimo Grassi - PhD
> Laboratorio di Psicologia
> Via Petracco 8 - 33100 Udine - Italy
> http://www.psy.unipd.it/~grassi
> ----------------------------------------------------------------------
> SEMEL (SErvizio di Messaging ELettronico) - CSIT -Universita' di Udine

Bernhard Laback, Ph.D.
Acoustics Research Institute
Austrian Academy of Sciences
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