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Authors: Chatelain, J.-L.* 
Guillier, B.* 
Cara, F.* 
Duval, A.-M.* 
Atakan, K.* 
Bard, P.-Y.* 
Title: Evaluation of the influence of experimental conditions on H/V results from ambient noise recordings
Journal: Bulletin of Earthquake Engineering 
Series/Report no.: 1/6 (2008)
Publisher: Springer Netherlands
Issue Date: 2008
DOI: 10.1007/s10518-007-9040-7
Keywords: Microtremor
Site effects
Field conditions
Subject Classification04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous 
04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques 
Abstract: The H/V-noise technique is now widely used to estimate site effect parameters (fundamental frequency and sometimes the associated soil amplification), and many surveys using this technique have provided convincing results. However, a general agreement on a methodology for data acquisition, data processing and result interpretation has yet to be found. H/V measurements from ambient noise recordings imply both reliability of the results and rapidity of data collection. It is therefore important to understand which experimental conditions (1) influence data quality and reliability, and (2) can help speeding up the recording process. Within the framework of the SESAME European project, a specific task was defined to investigate the reliability of the H/V spectral ratio technique in assessing the site effects. The aim of WP02, one specific Work Package of the SESAME project, is to study the effects of experimental conditions on both stability and reproducibility of H/V results. This study has been conducted in a purely experimental way, by testing the possible influence of various experimental conditions on H/V results both on the frequency peak value and on its amplitude. WP02 results help setting up the experimental conditions under which ambient noise recordings have to be performed in order to provide reproducible, reliable and meaningful H/V results. In this paper we present the results of the WP02 SESAME project concerning the evaluation of the influence of experimental conditions of ambient noise recording on H/V results.
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