Audio (sound) frequencies above the range of the human ear. This is generally said to be above 20,000 hertz.
sound waves with frequencies 20 hertz or lower are infrasonic and waves above 20,000hertz are ultra sonic!
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
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.
they change colors
Sonic the Hedgehog - 1993 Ultra Sonic 1-3 was released on: USA: 2 October 1993
Sound waves too high for humans to hear are called: ultrasonic
Humans cannot hear ultrasonic sound because our ears are not sensitive enough to detect frequencies above 20,000 Hz, which is the upper limit of human hearing. Ultrasonic sound waves have a frequency higher than 20,000 Hz, making them outside our audible range.
no
ultrasound, ultramodern, ultravioletUltramarine, ultramontane, and several hyphenated words such as ultra-violet, ultra-vires, ultra-sonic and ultra-microscope
Dark sonic Hyper sonic Normal sonic Metal sonic (created by Eggman ) Werehog sonic Fire sonic
ultra sounds are used for seeing a baby in an ultra sound