I still do not understand what you are asking.Sorry for that,
basically i want to play a high frequency sound on my phone and than connect the wires from earphone that goes to the speaker to the input of my transistor switch.
I want to do this so that i cant change the frequency easily and to a wider range.
I'll play The devil's advocate.I was wondering if i can generate high frequency pulses using this for using it in many of my projects