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Infra-sound

Theory: Tiger's growl/roar is able to paralyze its victims temporarily

victims who survived from tiger attacks claim tat they felt numb, their body paralyzed temporarily after hearing wat seemed to be a tiger's roar and then was being attacked by a tiger.

scientist found out that infra-sound is emitted by tigers via their growl/roar.

infra-sound is a sound so low tat humans r unable 2 hear. however, humans are able 2 feel e effects of infra-sound, for example, vibration can be felt if infra-sound is played. animals, on e other hand, r able 2 emit n receive/hear infra-sound.

many ppl think tat giraffes r unable e communicate with each other via sound. giraffes, in fact, r able 2 communicate with each other via sound. they use infra-sound. as humans r unable 2 detect infra-sound, they tink tat giraffe r mute. the giraffes hav deep chest with large lungs and long necks. air pushed out from their lungs, travel up their windpipe 2 their voicebox at a very fast speed. due 2 their long windpipe n deep chest, e sounds tat they emit are infra-sound.

experiments done: two experiments did on tigers to prove tat tigers r able to detect infra-sound.

experiment 1:
a young malayan tiger, about 16 months, was caught and placed in a zoo. it was sedated and then transported to a lab.
as it was a young tiger, scientists think tat its sensitivity towards infra-sound is higher compared to an adult or older tiger.
equipment use to detect brain activity was placed at the back of the young tiger's skull. if the young tiger is able to detect infra-sound, though being sedated, the equipment will be able to detect extra brain activity apart from the normal brain activity.
infra-sound was being played via a microphone placed near the tiger's ear. humans there r unable to hear anything. however, the data showed tat there are signs of brain activity, apart from the norm, happening in the brain of the young tiger when the infra-sound was being played.

experiment 2:
a tigress with her two cubs were being tested
infra-sound was being played in the direction of the tigress and her 2 cubs. the infra-sound was taken from a roar emitted by a 400 pounds angry adult male Siberian tiger.

male tigers are known for killing and attacking young tiger cubs.

if the tigress is able to detect the infra-sound, which was being played, she would show signs of distress and alarm and will be on the alert.
if not, the tigress will be relax waiting over her cubs while the cubs play around.

when the infra-sound was being played, the cubs stopped playing and were curious about the sound that was being played. the cubs were not alrmed as they were born in the zoo and were not aware tat the sound, which was being played, was emitted by a male tiger. the tigress, on te other hand, was alarm and in distress. she was pacing about the enclosure, looking out for the 'tiger' who was emitting that sound. she was on the alert and was watching out for her cubs.


these two experiments shows that tigers r able to detect infra-sound.