Meh, not sure either. That textbook was from ages ago. And I'm not a physicist by education.
You don't need any special format for these techs. Just say whatever you want and ask questions if you have them.
(Ototon Genjutsu: Banshī no te de gōmon no seiki) Sound Release Illusionary Art: A Century of Torture at the Hands of a Banshee
Type: Offensive
Rank: S-Rank
Range: Short-Long
Chakra: 40
Damage: N/A
Description: The most powerful sound illusion to be created, A Century of Torture at the Hands of a Banshee is a deviant technique, capable of rendering even the most powerful of enemies riddled with fear. The user will focus his sound chakra into a sound he will produce and which will carry the illusion and trigger it on any enemy that hears it. The illusion triggered is simple but surprisingly effective in all its simplicity: pain. Anyone who hears the sound will feel unimaginable amounts of pain all over their body to such an extent that they may even vomit and lose control of their chakra flow. Upon facing such pain, the enemy will lose control over his body and spasm as they curl to try and alleviate the pain. The longer the target is caught in the illusion the more severe the effect is. The illusion however is just that: an illusion. The pain isn't real or associated with any bodily aspect or damage. The user must, however, sustain the inducing sound and focus into his chakra flow (not being able to mold chakra at the same time) to sustain the effects of the illusion as when the sound ends, the enemy stops feeling the pain and recovers virtually immediately. Sounds that can trigger the illusion and carry it can vary from a whistle (very effective as it can be sustained for a lengthy time and be controlled), scream (less lengthy but easier to perform), music (if the user has a musical instrument), etc. If the sound is momentary, however, it will not induce an effective effect.
Note: usable once every 4 turns
Note: while sustaining the sound, the user cannot attack or move from his position, risking otherwise disturbing the sound he's producing and ending the illusion.
So this is an S-ranked illusions that is initiated by a loud sound. Just focus sound chakra in your throat and scream (you can whistle or play an instrument as well, but it just wouldn't be right to the name of the tech without screaming). That's pretty much it. The sound will affect anyone who hears it and cause them great pain. The pain will distract the opponent, it won't cause them any physical damage. It will disrupt their chakra so you can stop the opponent from momentarily performing techs. The longer it lasts the stronger it is. But the drawback is that you can't attack or move or else it'll end the technique.