Originally Posted by
FullWings
And means you experience them for 2.5% longer...
Indeed. But since the human response to gusts is not linear, in practice its usually better to be exposed for longer at a slightly reduced 'g' level.
ISO2631 provides some design guidelines for human reaction to and exposure to vibrations.
Not sure how well that comes out, but the important thing to notice is that the vertical scale - acceleration in 'g' or in m/sec^2 - is logarithmic. If we use a frequency of about 50Hz as an example (and I accept that turbulence frequency varies, but the curve is similar in behaviour elsewhere) we see that 1 min at +/-0.2'g' is equivalent to more than 8 hours at 0.02'g', whereas a linear exchange would have said 1 min at 0.2'g' equals 10 min at 0.02'g'. So its better to be exposed for longer, if you can get the amplitudes down, at a linear exchange.
Incidentally, I'm not sure which of the ISO2631 graphs that is - it's a costly document so finding a public domain image wasn't easy. Theer are (IIRC) a series of charts which show maximum exposure time as a function of 'g' and frequency, with the charts corresponding to different levels of impact (everything from mild nausea to imminent death). Charts like these are used in design assessments of both normal ops and failures cases, where oscillations might be expected.