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Communication Dans Un Congrès Année : 2012

Masking effects in vertical whole body vibrations

Carmen Rosa Hernandez
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Etienne Parizet

Résumé

The existence of masking effects for vertical vibrations of seated subjects was investigated. In a first experiment, detection thresholds of sinusoids at six different frequencies (between 30 and 80 Hz) were estimated using a 3-AFC with a three-down one-up rule. Then, thresholds were estimated in the presence of a vibratory masking stimulus: a band pass noise (10 to 20 Hz) at three different levels (between 0.1 and 0.315 m/s2). The presence of this band-pass noise increased the threshold of all studied frequencies. At detection, the overall level of the signal (masker noise plus sinusoid) was greater than the level of the masker noise alone by a value close to the just noticeable differences in level for this noise. Results suggested that the detection was related to a global energy level discrimination process. Finally, some indicators explaining this phenomenon are presented.

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Dates et versions

hal-00810661 , version 1 (23-04-2012)

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  • HAL Id : hal-00810661 , version 1

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Carmen Rosa Hernandez, Etienne Parizet. Masking effects in vertical whole body vibrations. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810661⟩

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ACOUSTICS2012
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