Hi Zico The problem I am trying to tackle involves the reduction in the PSD spectrum levels for the operational vibration of components. The current input for the operational vibration calcs is based on the -6db/octave spectrum. It has been requested to use a spectrum reduced by 4.5 db as the input!...

Hi Zico This is a requrement from the vibration spec for analysis of different parts - I am not quite sure of what it is asking us to this is the input into vibration test/analysis for structural components. The input which originally was specified at the level of 017 g2Hz has to be reduced by this ...

I would be grateful if anyone can help me work out the following PSD calc:

0.17 g2Hz reduced by 4.5 dB

Many thanks in advance

Faz