Well...in theory, yes, though if this would be allowed, I'm not sure. Same for a blow to the head and using the ensuing waves to interrrupt brain flow activity. I'd assume while possible, it was intended for limb targetting and causing respiratory problems.
Yeah, I made a jutsu similar to the concept of Jackhammers. ^_^ Even named for it xD
Hmm..I would assume so, yes. By using the vibrations from the jutsu to resonate against a earthen wall and weaken it, not necessarily breaking it. With water, it'd be more or less the same effect. Though, there is a canon jutsu that does this and to greater effect that you'll see later.
(Ototon: Oto Bunshin no Jutsu) - Sound Release: Sound Clone Technique
Rank: B
Type: Supplementary
Range: Short
Chakra Cost: 20
Damage Points: 20(40 when its disperses)
Description: Creates a clone of sound that can send high sound waves at the foe. Does double the damage when disperse.
Quite simple, yet lacking and inconvenient in in description again. Needs heavy revamping.
Creating a clone out of sound or sound chakra, that can actually send sound waves at the opponent. The nice part, it doesn't specify what the sound waves do, so use this to your imagination. Apart from that, using this in combination with a genjutsu, and specifying what happens when the clone disperses (as you can choose the effect really), making it a killer combo if needed. I'd say that you could disable them or damage them with the disperse/sound waves. Remember, it does only have a B-rank in power, so don't overestimate it. Low frequency, high frequency, all the same. It can be anything. It can only use sound techniques if I remember correctly, yes. What it means, I don't know. Apparently sound can take on a coherent and "solid" form. LOL.