Effect of very low frequency on H/V - Revision history

Marc: Filter details moved to Effect of very low frequency on H/V

2010-03-12T07:51:08Z

Filter details moved to Effect of very low frequency on H/V

Bertrand Guillier at 17:33, 10 March 2010

2010-03-10T17:33:04Z

Bertrand Guillier: New page: Here, it is displayed how the H/V can be influenced but a low frequency content in the signal. For that purpose, we merge two different signals: 300px *one a...

2010-03-10T16:35:36Z

New page: Here, it is displayed how the H/V can be influenced but a low frequency content in the signal. For that purpose, we merge two different signals: 300px *one a...

New page

Here, it is displayed how the H/V can be influenced but a low frequency content in the signal. For that purpose, we merge two different signals:

[[Image:Merging_signals.png|300px]]
*one at a site having a resonance frequency around 1 Hz
*one displaying a low frequency component within [0.1-0.2 Hz]

Then the merged signal is computed in H/V

← Older revision		Revision as of 17:33, 10 March 2010
Line 5:		Line 5:
	*one displaying a low frequency component within [0.1-0.2 Hz]		*one displaying a low frequency component within [0.1-0.2 Hz]

−	Then the merged signal is computed in H/V	+	Following the Sesame recommandations, to define a 1 Hz frequency for H/V processing, a 10 seconds window should be enough.
		+
		+	Then the merged signal is computed in a H/V and Spectrum way with 20, 60 and 100 second.
		+
		+	At first, the processing has been done without high pass filter. In this case, the 1 Hz peak appears only with the 100 seconds windowing.
		+
		+	[[Image:No_high_pass_filter.png\|300px]]
		+
		+	Later on, another processing has been done with a 0.5 Hz high pass filter. In this case, the 1 Hz peak appears directly with a 20 seconds windowing.
		+
		+	[[Image:High_pass_filter.png\|300px]]

← Older revision	Revision as of 07:51, 12 March 2010
(No difference)