Wiadomość #35263

[t0ma]

Spox tylko zastanawia mnie ten wykres i jego sugestia, że istnieją wartości powyżej 1...

wedlug wiki:
Acoustical materials manufacturers often report NRC values higher than 1.0 due to the way the number is calculated in a laboratory. A test material's area does not include the sides of the panel (which are exposed to the test chamber) which vary due to its thickness. A certain percentage of the sound will be absorbed by the side of the panel due to diffraction effects.

wedlug tego testu
wytloczki maja odziwo 0.4 NRC (ale z drugiej strony to zalamanie na wykresie)
NRC = 0 (idealne odbicie) NRC = 1 (idealne pochlanianie)
a liczone jest ze sredniej  z badania czestotliwosci 250 Hz, 500 Hz, 1000 Hz i 2000 Hz

i jeszcze cytat:
Another thing to consider is flammability.  Take an egg carton outside and put a match to it!  Then ask yourself, "Do I still want this on my studio walls?"

fajna dyskusja