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	<title>Talk:Effect of very low frequency on H/V - Revision history</title>
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	<updated>2026-04-22T17:46:28Z</updated>
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		<id>https://www.geopsy.org/wiki/index.php?title=Talk:Effect_of_very_low_frequency_on_H/V&amp;diff=2460&amp;oldid=prev</id>
		<title>Mao: New page: To be honest I find this discussion very artificial - and the example even more... what kind of low-frequency signal are you adding to broadband signal? A broadband signal should contain a...</title>
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		<updated>2010-03-12T08:09:36Z</updated>

		<summary type="html">&lt;p&gt;New page: To be honest I find this discussion very artificial - and the example even more... what kind of low-frequency signal are you adding to broadband signal? A broadband signal should contain a...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;To be honest I find this discussion very artificial - and the example even more...&lt;br /&gt;
what kind of low-frequency signal are you adding to broadband signal? A broadband signal should&lt;br /&gt;
contain already the low frequency component... shouldn&amp;#039;t it? So it looks that you arbitrarily mix&lt;br /&gt;
two signals which do not correspond to each other - one from a site recording and another one from&lt;br /&gt;
&amp;#039;&amp;#039;whereever&amp;#039;&amp;#039;(?)&lt;br /&gt;
&lt;br /&gt;
If you use a broadband sensor in good installation and with reliable equipment (20+ Bit)&lt;br /&gt;
there should be no reason why to exclude the low frequency content from your recordings.&lt;br /&gt;
If we believe that we observe the response to the ground structure, this should be true also for the&lt;br /&gt;
low frequency part of the signal.&lt;br /&gt;
&lt;br /&gt;
If your broadband sensor is not yet stabilized or there is reason to believe that you have&lt;br /&gt;
a lot of tilting signals on the horizontal component, than this is another story....&lt;br /&gt;
But then one should ask whether it is not better to use a sensor with higher cut-off frequency...&lt;br /&gt;
&lt;br /&gt;
[[User:Mao|Mao]] 09:09, 12 March 2010 (CET)&lt;/div&gt;</summary>
		<author><name>Mao</name></author>
		
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