Subject: sound

Can an object be detected at a distance, hidden in the ground using 
the following process:
Using a Frequency Generator to create a known resonent frequency of an 
object, pulsing the frequency and amplifing it through the ground.  
Using a frequency detector/counter (commercial models available today) 
attached with a parabolic dish containing a microphone capible of 
picking up a sound at the frequency of the resonation from the object?
Is this possible?  If possible, are there any modifications which may 
be required?

Re: sound