:sy:
First of all, a
frequency is measured in Hertz. A frequency in theory is how many waves pass a certain point in a certain amount of time. So, basically, the lower the interval, the higher the frequency. Now, the cool thing is, adjusting the frequency. A higher frequency is a higher pitched tone, while a lower frequency is a lower pitched tone. If you listen to music and hear the bass, the frequency is lower. You can also feel it in your body a lot more than high frequency tones, because generally those are harder to perceive in the first place. The neat thing is, that this allows us to alter the effects of sound techniques by altering the frequency. That being said, you probably see how versatile sound actually can be, and how it can create different effects. Even if you can't hear something, the sound waves are still there and can still have effects on your body, hint for customs

Oh, humans can only hear certain frequencies, or a range in between 2 frequencies. Generally, this is about 20 - 20 000 Hertz. Now, as you grow older, your body gets older as well, and you start to have trouble hearing high frequency tones. This is why younger people generally hear a lot better than old people. I was wondering if you speak in a lower voice, if people with hearing problems would understand you better, but I'm unsure (though it makes sense). This does not mean that higher/lower frequencies do not effect the body, that's very important to note.
Any questions about this? I expect so, as its good to make sure you understand everything clearly.