squirrel repelling project

[Gbarnard]

Hello, I am very inexperienced with electronics and i have to build-it seems to me- a very complicated electronic circuit. This circuit is for scareing away a squirrel with sound. This circuit can not have a mechanical switch and when the squirrel triggers the circuit, it must emit a sound that only a squirrel can hear. This sound can not be heard by a dog or a human and must stay on for five seconds after the circuit is triggered. If anyone has any information that could be useful to me it would be much appreciated

 

[SupeR-NovA]

well, first you have to give us the freq. that you intend to use (the one that only a squerl can hear)

 

[Optikon]

well, first you have to give us the freq. that you intend to use (the one that only a squerl can hear)

I could be wrong (I havn't looked into it) but I wouldn't think that a squirrel's range of hearing is higher than a dogs (why would it be?)
If that is the case, one couldnt produce a sound that a squirrel can hear but a dog cannot.