Mimmo2us wrote:well, now a few things about the sound absorbition.
higher the frequencies higher the absorbition. This is the rule.
This why in an orchestra there are many violins and few doublebasses. In the middle of the orchestra it is hard to hear the doublebasses because violins is the king here: in other world you hear violins mostly. But when you go far from the orchestra, in the middle of the concert hall, everything change. you hear a well balanced sound between high and low frequencies.
The very bass frequencies has a very very few absorbtions while the higher frequencies of the violins drops.
same with guitar strings. nylon produce a warm sound while fluocarbon strings are very brilliant. If you hear the guitar very close it is evident that the fluocarbon strings are better in matter of power.
But if you hear the same guitar with the same strings at 10 mt far you can hear am unbalanced sound: basses are far over the trebles that are weaker. Instead, if you have nylon treble strings the balance is much more better. Because nylon strings produces less higher frequencies ( Overtones) in the composition of their sound. The projection is better.
My english is not very good, however, I hope that things are clear anyway
thanks very clear. I hadnt thought of it like that