Spikes in RF labs are generally a soft foam, so you would probably just crush a bunch of spikes. See http://en.wikipedia.org/wiki/Anechoic_chamber http://en.wi

Spikes in RF labs are generally a soft foam, so you would probably just crush a bunch of spikes. See http://en.wikipedia.org/wiki/Anechoic_chamber http://en.wikipedia.org/wiki/Anechoic_chamber for more information about these kinds of rooms