Re: Noisiest Ceiling Ever - Help!
Not quite true.
Originally Posted by Ted White
Sound is composed of different frequencies with each frequency having different energy levels --- lower frequecies have higher energy --- higher frequencies have lower energy. The density and type of material used for sound control determines the effectivness. Sound energy is being transformed into heat energy which is why thermal insulation can be used for sound control.
Open cell materials like celullose , fiber glass , rock / mineral wool , open cell foam have the advantage since the sound is forced to travel through the various sizes of the open air pockets ---- this attenuates the sound level .
With increased density increases the resistance to the sound energy --- akin to increasing the distance sound travels ---- which equates to attenuating more sound frequencies.
"" an ounce of perception -- a pound of obscure "