masi1157 wrote:trauha wrote:Distance makes a big difference as dB decrease logarithmically with distance.
They don't. In a freefield environment they drop by 6 dB per doubling the distance, further away friom the source in the reverberant field they stay more or less constant. But that will take us too far off.
The important part was given by Thomas much earlier: Conversations from the next table or the next seat row might draw your conscious attention, but they are completely irrelevant for fatigue. The masking noise that you seem to desire on an aircraft (which is usually well above 70 dB(A)!) doesn't draw your attention, buit basically ruins your health and especially that of the crew working in that environment.
I thought dB is a logarithmic scale? In my experience someone talking two rows behind me is way more quieter than half as quiet, compared to someone talking in the row directly behind me? Please educate me.
As to the other point, my experience with irritating noise, no matter how quiet, e.g. 50dB talk leaking from neighbouring hotel room at night is very fatiguing. I would rather have the noisy air conditioner at a steady 70dB mask the noise.
In my 16 years of having my dB meter on flights, the biggest surprises have been the amount of hours that have exceeded 85dB which in my country is illegal, and how much noisier window seats and exits and some toilets are on some planes compared to aisle seats.