9/9/2023 0 Comments Telescopes auditory illusions![]() ![]() If at a distance of 2 meters from the snake, the snake suddenly changes this rule, and instead of making the 2 meter sound, it makes the sounds like it's only at 1 meter, then it fooled you," Chagnaud told Live Science in an email. "Imagine you walk towards the snake, it starts to rattle slowly, increasing the rattle events incrementally. He hypothesizes that human hearing, alongside the other mammalian auditory systems that it is closely related to, picks up on the frequency of the rattle and the rule of how it increases with distance, only to be fooled when the snake changes this rule with an unexpected, and sudden, jump in the frequency. How'd they do that? The best illusions of 2016 namedĬhagnaud thinks that rattlesnakes weave this weird auditory illusion in order to create a "distance safety margin" between them and a potential attacker. The cyber snake increased its rattling rate as the humans approached, suddenly leaping to 70 Hz as the volunteers came within 13 feet (4 m), and was able to trick all of the human participants into underestimating their distance to it. Sending 11 volunteers inside the simulation, the researchers asked the volunteers to approach the virtual snake and indicate when the creature was 3.3 feet (1 meter) away. To figure out why the snake was changing its rattling rate, and why it was using a sudden jump in frequency, the researchers designed a virtual reality grassland with a virtual snake hiding inside of it. According to the researchers, the rattling rate increased more quickly the faster the object approached, but changing the size of the object didn't impact the frequency level. ![]() ![]() As threats first approached, the rattling rose by a steady rate to a frequency of 40 Hz, but as the objects came closer, the frequency suddenly jumped to between 60 and 100 Hz. To figure out what was behind this phenomenon, he and his team recorded the frequency of the rattle as various objects - including a human-like torso and a black disk - were brought closer to the snake. ![]()
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