It's worth noting mini a reef shark and a large ocean going shark use their receptors quite differently .
A reef shark uses them under head searching for morsels in close range on the reef ...it is a concentarted scan of a small area ....like a hammerhead or white tip reefy, they will detect something and zone in on smaller and smaller circles untill they are over the frequency ...i do not believe they cover a large radious and not infront of them
larger sharks like tigers and whites and mako's use the sensors to find prey from up to 1 km away , taking a MASSIVE area from a wider angle ....hence being more prone to receptors picking up the signal from any angle nad are much more delicate ...which is also why a white doesn't mess around ...he can't risk damaging those receptors