[G Larry]

There are more than a few anechoic chambers around the world that cost a tad more than $1.5M.

[jaydubya2]

next to the box they put you in to check your hearing, the quietest place I’ve been is in a cave.

[texas booster]

Damping 120Db of sound is pretty awesome, and getting that type of performance for only 1.5 mill is quite a feat.

Some government contractors I know could design such a chamber for only $150 mill (plus an occasional cost overrun).

I wonder if there are any that dampen more than 120 Db?

[antidemoncrat]

Folks testing microwave systems and components have used anechoic chambers for years.