Conference_programme: 17.4 - Annoyance due to low-level sounds transmitted to dwellings

Lecture: The influence of energy-based parameters on annoyance due to combined railway noise and vibrations: a lack of consensus among the literature studies

Author(s): Maigrot Philéas, Marquis-Favre Catherine, Parizet Étienne

Summary:
Howarth and Griffin [JSV, 1990] showed that noise level has an influence on annoyance due to vibration. In the presence of high noise levels (> 75 dB(A)), partial annoyance due to vibration is reduced when vibration level is below 100 dB, but it increases when vibration level is more than 112 dB. The same study concluded that vibration level had no influence on annoyance due to noise.\n\nPaulsen and Kastka [JSV, 1995] showed that annoyance due to vibration was slightly increased in the presence of any level of noise, only when vibration level was not perceptible. Contrary to those of Howarth and Griffin [JSV, 1990], the results of this study suggest that annoyance due to noise tends to increase when vibration is present.\n\nAn experiment is currently conducted in the laboratory in order to answer both of the following questions: 1) Are the differences between the two studies due to differences in the ranges of the tested noise and vibration levels? 2) Are those differences due to non energy-based parameters related to the different types of trains under study?\n\n50 subjects participated to 2 sessions A and B during which they had to evaluate noise annoyance, vibration annoyance and total annoyance, for 25 combinations of noise and vibration. Stimuli are recordings of a passenger train (session A) and of a freight train (session B). The frequency contents of the vibratory recordings associated to these pass-bys show important differences. For each recording, different noise levels (from 42 to 74 dB(A)) and vibration levels (from 0 to 116 dB) are used in combination. These ranges of noise and vibration levels were chosen in order to cover the wide ranges of noise and vibration levels tested in the literature.

Corresponding author

Name: Mr Philéas MAIGROT

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Country: France