Talk:Effect of very low frequency on H/V

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 already the low frequency component... shouldn't it? So it looks that you arbitrarily mix two signals which do not correspond to each other - one from a site recording and another one from whereever(?)

If you use a broadband sensor in good installation and with reliable equipment (20+ Bit) there should be no reason why to exclude the low frequency content from your recordings. If we believe that we observe the response to the ground structure, this should be true also for the low frequency part of the signal.

If your broadband sensor is not yet stabilized or there is reason to believe that you have a lot of tilting signals on the horizontal component, than this is another story.... But then one should ask whether it is not better to use a sensor with higher cut-off frequency...

Mao 09:09, 12 March 2010 (CET)