That’s not stealth, that’s jamming.
No. Jamming is evident to the radar operator.
Have you ever had a physics lab where sound was made completely inaudible by the application of more sound waves? If not it is quite impressive. Now is the original noise silent? Yes and No, the sound waves are still there, but unlike just making a loud racket (jamming), they are completely undetectable to the receiver. The ear drum goes in and just stays there. You can still hear, just not the noise that is being canceled.
Whatever the actual target, a few days ago it was reported that Russian technicians were leaving Iran and that there were a certain unrest among the top echelon in Iran. Not unexpected since the Iranians have centered their air-defence on Russian systems.
The target: Hard to say. So far no on has measured any increased radioactivity, something that should have been possible to do if it was a large cache of enriched nuclear material that was bombed. On the other hand, just yesterday there were news that North Korea had agreed to dismantle its nuclear weapons program. Yes, we have heard that one before - but it would be so much easier to promise something like that if the weapons material had been transported half way across the world.
Finally, witnesses, reported now in both Israeli and international press, deny any bombing, but admit that war planes did fly across (”sound bangs”). So, three possibilities: a) the journalists have been fooled by planted witnesses, b) there were no bombings or c) the attack took place somewhere else.
Personally I would go for alternative “c”.
PS: I’m sorry I did not provide any links. I am traveling and not writing on my own computer so I have to make it “short and sweet”. However, try http://israelmatzav.blogspot.com for more information.