Jean-François Parrot

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Heart-rate and blood pressure measurements allowed analysis of cardiovascular responses (CVRs) to an intermittent pink noise in 9 Type A (coronary prone) and 8 Type B (non-prone) female subjects (Ss). If all Ss are sorted out in sensible, moderately sensible and poorly sensible subgroups, according to similarity in evolution of their heart rates and by(More)
This study aimed at comparing for their cardiovascular effects: a pile-driver noise (P), a gunfire noise (G), a road traffic noise (T), an intermittent pink noise (R). All noises were presented at the same LAeq = 75 dB for 15 min each. Some 120 subjects were divided into 8 subgroups of 15 subjects each: OM (men between 40 and 50 years of age), OF (women,(More)
Auditory brainstem responses (ABRs) were recorded in 60 male or female, anxious or anxiety-free university students, before and after separated or simultaneous intake of alprazolam and exposure to noise. A significant increase of the latencies of the ABRs was found when subjects took alprazolam. This effect is consistent with the presence of(More)
Thirty men and thirty women, the first half of them 40-50 years old, and the other half 15-20 years old, were exposed successively for 15 min to four different noises at the same continuous equivalent level LAeq = 75 dB. Auditory brainstem evoked potentials were recorded before and after exposure to each noise. No difference was found between these noises(More)
Thirty men and 30 women, 20-25 years old, and selected for presence or absence of anxiety were exposed successively for 15 min to four different noises at the same continuous equivalent level LAeq = 75 dB. Auditory brainstem evoked potentials were recorded before and after exposure to each noise. No difference was found between these noises as to their(More)
The unsupervised method proposed here for detecting structural features on satellite images consists of three major steps: a. The extraction of contours, which depends on the encountered texture, is obtained by an iterative filtering followed by several thresholds that generate binary images. The thresholds are determined by different percentages of pixels(More)