Highest achievable compression frequency

[jeberd]

I am wondering what the upper limit for frequency is currently as far as audio signal generators go.

Basically I want to know how high of a frequency I can get on a compression wave. I don't mean the theoretical limit based on the atomic spacing in the medium, but rather if I want to buy a signal generator (speaker) how high I will be able to get. Ultimately I am interested in creating a standing wave with very small widths for the compression region. I am thinking in the 10's to 100's of GHz but I don't know if such frequencies are realizable. I am suspecting that if it is going to be possible that piezoelectrics are going to be required.

Can someone help me out? Thanks.

 

[pallidin]

Piezo materiels do have a very high potential frequency response. Even still, a thin ferromagnetic membrane could be better.

 

[jeberd]

do you have any idea of what frequencies could be achieved though? I am less interested in how it is done, just what can be done, or is anticipated being able to be done.

 

[pallidin]

Yeah, I don't know jeberd. Maybe some expert will jump in. If not, maybe you could re-phrase the question and post it in the General Physics section. I've had luck there.