because ultrasound is more safer than audible sound.
Ultrasound
which? huh? u mean what? its an array of small piezo elements utilizing the "deformation" of sound making it highly directional. also, putting the same track ultrasound into both ears sounds like its in your head!!! (voice to skull). it has to be mono audio though. try it.
Sound below 20Hz is considered infrasound, while ultrasound typically refers to sound frequencies above the human hearing range (above 20kHz).
The AUDIO jack on the TV is a OUTPUT. The sound comes out of the TV to send the sound (audio) to the Audio Receiver Aux INPUT jack.
Ultra Sound
"audio" means "sound", it is the sound components of the multimedia system.
Audio sound is sound which human beings can hear. That is 20 Hz to 20,000 Hz for HiFi.
Ultrasound is typically performed by a trained ultrasound technologist, it involves using sound waves to get an image of the reproductive system.
Phase inversion audio refers to a situation where the phase of the audio signal is flipped, causing the sound waves to be out of sync. This can result in a loss of clarity and definition in the sound, leading to a decrease in sound quality in audio systems.
Audio is the science of sound and hearing.
"Sound" is a mechanical wave traveling through a medium. Ultrasound is sound, but its frequency is higher than humans can hear.
Endorectal ultrasound (ERUS) is a procedure where a probe is inserted into the rectum and high frequency sound waves (ultrasound waves) are generated