>Whats wrong with just using concrete???
What's wrong with *Lake - Pond* ??
There's no reason you could not or indeed should not open *Lake-Pond* material and save it as *Ice*
That is ... I can see no reason why molten H2O ... water ... should offer different reflection coefficients to frozen H2O .... Ice...
I can see a potential for a different refraction coefficient because Ice can at times deform rather significantly from the surface of a lake but ....
Aren't we talking acoustics here ???
And shouldn't we maintain a grip on the reliability factor of the acoustic outcomes of the designs we provide ???
There are many factors outside the model which will / must at times render a different measured outcome to the predicted ... so what??
So shouldn't our calculations and texts include an element of reliability of calculation that would surely be inside the reliability of the construction techniques used. That is ... it doesn't matter how carefully we measure a products acopustics the final result depends on a carpenter's skill in assembling the design.
ie. We should work within a margin for error anyway!
And .... IF indeed there IS a difference between the absorption coefficents of *Water* and *Ice* is it significant??? ... depending largely on the % of surface area of the enclosed space occupied by the ice.
OTOH .... I would NOT call myself an accomplished Ice Skater by any means but I have endured a few falls. I can attest that the notion that Ice = smooth concrete is well founded.