more than 2000hz
Ultra sonic waves are a sound frequency that is oftentimes silent to humans. Research shows there is no long term negative affects due to exposure to these sounds.
Infra sonic, ultra sonic and sonic waves of sound Infra sonic has frequecy less than 20 Hz Ultra sonic has frequency more than 20,000 Hz Sonic waves having frequency range 20 - 20000 Hz
Ultra high frequency.
Assuming you mean a super form called Ultra Sonic, No
Correction, Yes there are such beings as Solar Sonic and Ultra Sonic, however, they does not make an Apperance in any of the games, Solar and Ultra Sonic only appeared in the Comics, Ultra Sonic was the Base form Sonic would Assume when he collected a certain Number of Rings (1000 i believe) and he could change his form based on the climate of the Area he is in, Solar Sonic assumes control when Ultra Sonic is in a hot, Arid area, such as a Desert, there is also Eco Sonic for forests and Polar Sonic for Ice caps
Ultrasound is sound we can not hear. Our ears can detect vibrations between 20-20,000 hertz (vibrations per second); anything outside this range is still physically a sound, but we simply can't detect it.
we can not hear ultra sonic sounds because u can not hear them
Ultra Sonic first appears in Sonic the Hedgehog #'s 65 and 66, with additional appearances in Sonic the Hedgehog #71 and Super Sonic Special # 15.
frequency
Frequency
they change colors
That's the frequency of the vibrations.