!"#$%&''()*%+,%-+#&-."%-+)(/"#%'-+0+)1"$%''%-+23/41,%-+531647-&."%-8+
Eric LAROSE, Laurent BAILLET, Denis JONGMANS & co
PhD stud : Mathieu LE BRETON, Guénolé MAINSANT, Antoine GUILLEMOT & co ...++
9."&6%+:31647-&."%+,%-+;&-."%-+%/+,%+'<9)$))%2%)/+=!>%##%?++@A;!+B+C)&$D+:#%)1E'%+F'6%-+
Partenariats : +
GD! F)('7-%+$&E#(/1&#%+
HD! I(#&(/&1)+,%+$&/%--%+J+E#"&/+,%+K1),+-&-2&."%+
LD! M%-"#%+,%+,3K1#2(/&1)+0+>%*4)1'15&%+;N=O+
M%*4()&*('+$&E#(/&1)+P+9'(-/&*&/7+Q+2(--+++
f =rigiditymass
!"#$%&'(&)#*&+,-.&/0#
!"#$"%%&$"#'(%$()*+*#,'-.'/0$+1$"#('
!"#$%&'(&)#*&+,-.&/0#
R%$7+%/+('?+:S=+THUGUV + +W1//%'&)+%/+('?+:S=+THUGLV+
!"#$%&'(&)#*&+,-.&/0#
!"#$%&'(&)#*&+,-.&/0#
!"#$%&'(&)#*&+,-.&/0#
K(&'"#%+
R%$7+%/+('?+:S=+THUGUV + +W1//%'&)+%/+('?+:S=+THUGLV+
!"#$%&'(&)#*&+,-.&/0#
;%-1)()*%+N#%."%)*7+
W1//%'&)+%/+('?+:S=+THUGLV+ + + +R(#1-%+%/+('+THUGXV+
!"#$%&'(&)#*&+,-.&/0#
N++++ +!++++ +#%(#+K#(*/"#%++
+ + + +E"'Y+,(2(5%JK#(*/"#(/&1)+T#&5&,&/7++++V++
+ + + +/4%#2('+%KK%*/++++++++8++++++++8++
N+++ +K#(*/"#%+
#&5&,&/7++++V+
++++++++8++++++++8+++++++++8++++++++8+
!"#$%&'(&)#*&+,-.&/0#
N++++ +!++++ +#%(#+K#(*/"#%++
+ + + +E"'Y+,(2(5%JK#(*/"#(/&1)+T#&5&,&/7++++V++
+ + + +/4%#2('+%KK%*/++++++++8++++++++8++
>Z++P[++#&5&,&/7++++++\D++++W"/DDD+++
N+++ +K#(*/"#%+
#&5&,&/7++++V+
++++++++8++++++++8+++++++++8++++++++8+
>Z++P[++ ++++++
!"#$%&'(&)#*&+,-.&/0#
N++++ +!++++ +#%(#+K#(*/"#%++
+ + + +E"'Y+,(2(5%JK#(*/"#(/&1)+T#&5&,&/7++++V++
+ + + +/4%#2('+%KK%*/++++++++8++++++++8++
>Z++P[++#&5&,&/7++++++\D++++W"/DDD+++
N+++ +K#(*/"#%+
#&5&,&/7++++V+
++++++++8++++++++8+++++++++8++++++++8+
>Z++P[++ ++++++
>Z++P[++/4%#2('+,&'(/&1)+++P[+'1*('+-/#%--+++P[+#&5&,&/7+++++++>Z++P[++/4%#2('+,&'(/&1)+++P[+'1*('+-/#%--+++P[+Z++P[++/4%#2('+,&'(/&1)+++P[+'1*('+-/#%--+++P[+Z++P[++/4%#2('+,&'(/&1)+++P[+'1*('+-/#%--+++P[+#&5&,&/7+++++++
2345 ' ''637'
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R(+W1"#)%+:1#5%-++
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!"#$%&'(&)#*&+,-.&/0#
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+!%&-2&*+!%)-1#-+
;%&)K1#*%2%)/+
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@1'"2)+#%]&)K1#*%2%)/+
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;%&)
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!"#$%&'(&)#*&+,-.&/0#
GD! F)('7-%+$&E#(/1&#%+
HD! I(#&(/&1)+,%+$&/%--%+J+E#"&/+,%+K1),+-&-2&."%+
LD! M%-"#%+,%+,3K1#2(/&1)+0+>%*4)1'15&%+;N=O+
>&2%+1K+K'&54/++!%&-2&*+$%'1*&/7+++•! ,IJI+`U+
–![+=)*#%(-%+1K++,%)-&/7+Ta(/%#+*1)/%)/V+8+–![+,%*#%(-%+1K+-/#%--+–![+,%*#%(-%+1K+#&5&,&/7+TK#(*/"#(/&1)J,(2(5%V+
v =rigiditédensité
!++++ + +++;+ >&2%+1K+K'&54/+
!%&-2&*
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
>&2%+1K+K'&54/++!%&-2&*+$%'1*&/7+++•! ,IJI+`U+
–![+=)*#%(-%+1K++,%)-&/7+Ta(/%#+*1)/%)/V+8+–![+=)*#%(-%+1K+/%26%#(/"#%+–![+,%*#%(-%+1K+-/#%--+–![+,%*#%(-%+1K+#&5&,&/7+TK#(*/"#(/&1)J,(2(5%V+
v =rigiditédensité
!++++ + +++;+
A%%,+#%6%(/(E'%+-1"#*%-+Q+6#%*&-%J-%)-&/&$%+-&5)('-DD+
>&2%+1K+K'&54/+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
Ambient noise
Workflow
Amplitude clipping / 1-bit
Frequency Whitening
Daily X-correlation
Averaging
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
GUU+2+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
,I+J+
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,I+J+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
,I+J+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
M(&)-()/+%/+('?+S:;+THUGHV+
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
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e%#2(K#1-/+21)&/1#&)5+
0 100 200 300 400
-2
0
2
dV/V
(%)
-50 0 50 100 150 200 250 300 350 4001-2 @4Hz-8Hz
0.6
0.7
0.8
0.9
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+ ++-(/"#(/&1)Q,%-/(E&'&-(/&1)+
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1"#6/2-#7-*%#80.%,5%,/(%.,9:# # # # # # # +9D+R(#1-%+
GD! F)('7-%+$&E#(/1&#%+
HD! I(#&(/&1)+,%+$&/%--%+J+E#"&/+,%+K1),+-&-2&."%+
LD! M%-"#%+,%+,3K1#2(/&1)+0+>%*4)1'15&%+;N=O+
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With !air 64(-%+-4&K/+&)+/4%+(&#+T#(,Vk+d tag-base ,&-/()*%k+v #(,&1+a($%+$%'1*&/7+&)+/4%+(&#+Tl+*Vk+f *(##&%#+K#%."%)*7+TmgX]mgm+MhcVD+
=)+16/&2"2+*1),&/&1)-+0+
measured instruments air! ! != +
;"#</0&./,&0=#>?8@ # # # # # # +9D+R(#1-%+
measured instruments air! ! !measured instruments air! ! !measured instruments air= +! ! != +! ! !measured instruments air! ! !measured instruments air= +measured instruments air! ! !measured instruments air
>%26%#(/"#%+%KK%*/-+1)+/4%+
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+•! ;N=O+&-+21#%+-/(E'%+
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;"#</0&./,&0=#>?8@ # # # # # # +9D+R(#1-%+
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;"#</0&./,&0=#>?8@ # # # # # # +9D+R(#1-%+
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1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
100' 101' 102' 103' 104' 105'-1.5'
-1'
-0.5'
0'
0.5'
1'
1.5'
time (µs) '
8 bit digitizing'
1 bit digitizing'
Larose et al, JAP 2004
G]E&/+)1#2('&c(/&1)+
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
100' 101' 102' 103' 104' 105'-1.5'
-1'
-0.5'
0'
0.5'
1'
1.5'
time (µs) '
8 bit digitizing'
clipping'
F26'&/",%+*'&66&)5+T#2-V+
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
Larose et al, JAP 2004
rm+
100' 101' 102' 103' 104' 105'-1.5'
-1'
-0.5'
0'
0.5'
1'
1.5'
time (µs) '
8 bit digitizing'
clipping'
Larose et al, JAP 2004
F26'&/",%+*'&66&)5+T#2-V+
1"#2343#5,/(#-(+&-0.#'%&'(&)#0/&'% # # # # # # +9D+R(#1-%+
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