Just do a basic double blind test. get someone else to switch the hz a couple of...

		umbra07 4 months ago \| parent \| context \| favorite \| on: How a hawk learned to use traffic signals to hunt ... Just do a basic double blind test. get someone else to switch the hz a couple of times for you, and see if you can tell the difference. i would be surprised if you got anything less than a 100% success rate.