“Following the 12-day war with Israel in June, Iranian authorities learned that Israel could easily locate their radar systems and take them out, leaving Tehran’s forces blind to the skies above, Avivi said. Unlike the radar installations, the cameras don't transmit a signal that Israel can use to locate them, he added.”

Damn innovative.

It's a pretty old idea, too.

https://en.wikipedia.org/wiki/Acoustic_mirror

https://www.cnn.com/style/article/war-sound-locators-before-...

Might be good for early detection, but unfortunately doesn't provide any defense on its own.