The only way to be sure is to connect a 1.5V battery between Long Island Sound and the waters of Florida and see if it detects it.
The only way to be sure is to connect a 1.5V battery between Long Island Sound and the waters of Florida and see if it detects it.
Given the number of boats and ships around with sacrificial anodes, I think it would have a hell of a job.
I suspect that its response is low frequency AC rather than DC too. You don't want a hammerhead with uncontrolled drift!
The only way to be sure is to connect a 1.5V battery between Long Island Sound and the waters of Florida and see if it detects it.
Given the number of boats and ships around with sacrificial anodes, I think it would have a hell of a job.
I suspect that its response is low frequency AC rather than DC too. You don't want a hammerhead with uncontrolled drift!
Undoubtedly it will be tuned to pulses from muscles in prey, but that's still a hell of a front end, wonder what the bandwidth is, how it filters out noise and if there is a DC blinding effect?
Don't know about 1nV per meter... but
https://en.wikipedia.org/wiki/Ampullae_of_Lorenzini
"Sharks may be more sensitive to electric fields than any other animal, with a threshold of sensitivity as low as 5 nV/cm"
From the link, it looks as if Hammerheads have Geomagnetic sensing too. Given that they already have inherent biological accelerometers and gyroscopes, the only thing they're missing is GPS!
The only way to be sure is to connect a 1.5V battery between Long Island Sound and the waters of Florida and see if it detects it.
Given the number of boats and ships around with sacrificial anodes, I think it would have a hell of a job.
I suspect that its response is low frequency AC rather than DC too. You don't want a hammerhead with uncontrolled drift!
I guess they used that comparison in order to demonstrate the orders of magnitude involved to a lay audience. But if you have seen a hammerhead shark hunting, it searches for prey hidden in the sand, maintaining its receptors at a distance of no more than 10cm above the sea bed. These sharks know how to avoid interference.
Don't know about 1nV per meter... but
https://en.wikipedia.org/wiki/Ampullae_of_Lorenzini
"Sharks may be more sensitive to electric fields than any other animal, with a threshold of sensitivity as low as 5 nV/cm"
I think the OP's video got it wrong. They say 1nV/cm², however electric fields are expressed in V/m, not V/m². There's another video which claims that the receptors are capable of sensing 15nV of potential difference, regardless of distance.
That hammer head sure looks like an antenna or similar to me. this is pretty interesting. I am not a shark or even close. But I can sense small electric currents with my mouth.
. I am not a shark or even close. But I can sense small electric currents with my mouth.
This sounds impractical to me, if you try this at work.
That hammer head sure looks like an antenna or similar to me. this is pretty interesting. I am not a shark or even close. But I can sense small electric currents with my mouth.
We've all licked a 9V battery.