Originally Posted by nitrosatya

I once saw a program on National Geographic about polar bears. The expedition team were using some equipment which the bears used to destroy. The reason was found out to be low frequencies emitted by the machines.Similar experiments were done on elephants.And same results.

Similarly, the inline four cylinder engines also emit low frequencies or rather BASS in music terms. That is why the animals are agitated. Surprisingly my friend's dog behaves normal when a subwoofer plays loud bass nearby.

That is my observation.