演唱：松本口森（Matsumoto Koumori） 作词：化学之国、松本口森（Matsumoto Koumori） 作曲：化学之国 From the universe to the animals Sound waves are everywhere Whether it's infrasound waves from elephants Or ultrasonic waves from bats This is also a part of physical acoustics When you see a herd of elephants fidgeting Don't hesitate it's an earthquake coming This is because they can hear infrasound But we also need to know that this thing is harmful to people But on the basis that elephants can hear it Maybe it's the inspiration of earthquake detectors Making according to the structure of animals is called bionic This is equivalent to a one-to-one copy When you are close to the bat but there is no sound This is normal After all it can hear ultrasonic waves From the universe to the animals Sound waves are everywhere Whether it's infrasound waves from elephants Or ultrasonic waves from bats This is also a part of physical acoustics A part of physical acoustics Involved in many aspects I almost forgot the range of these two sound waves This has to mention the knowledge about tones If the hertz value is less than twenty Then such a tone is collectively called infrasound So if it's greater than 20 thousand hertz We collectively call it ultrasound This tone can be heard by many animals Not only us bats but also others can do it If you have studied music theory or acoustics It's easier for you to understand the content From the universe to the animals Sound waves are everywhere Whether it's infrasound waves from elephants Or ultrasonic waves from bats This is also a part of physical acoustics At this point of tone it includes the sound frequency Different animals have different ranges Some animals make sounds that humans can't hear The reason is related to the listening range It can be inferred that I sing at a low frequency I'm a bat and my vocal frequency is just high Next time if I hear anything It may be the sound from radar This is a bionic function based on bats Where the frequency is parallel to this From the universe to the animals Sound waves are everywhere Whether it's infrasound waves from elephants Or ultrasonic waves from bats This is also a part of physical acoustics