Please use in-ear headphones to listen to this. Â This is an important piece of recording to understand silent sound communication.
Just let me quickly explain why this recording is important.
This is a recording by an ultrasound microphone of a set-up that only transmitted radio frequencies. Â The radio frequencies were monitored via a Velleman oscilloscope to make sure that they were in the air keeping in mind that might be rogue signals in the air too.
You see the idea with this silent sound communication is to be totally unseen and seemingly unheard BUT for the tinnitus sound that it would create in the head.  The reason for this and this is the way it is designed to make it work.  WORK? Work for what? The design of the transmission using a radio frequency is to get to communicate with you without you hearing a sound.  The  sound tone (in the recording above is 18000hz within the hearing range) and the transmission frequency (I am not sure how much this matters but for it to create a stir in the air for you to hear it).  What all of this does is that it generates an atmosphere thick enough in the atmosphere with the intensity of the bespoke RF freq. transmitted to be able to communicate with you silently.
There is a lot being said on the net about a microwave signal generating sounds in the head etc. and only until recently they have speculated that the sounds are heard because of minute vibrations in the brain due to temperature fluctuations generated by the RF signals that is causing you to have an intuitive experience because of this bespoke RF design. Â I think this is not the case but it is a totally SOUND experience through the normal hearing process. Â The RF signal is a high intensity RF signal that carries a modulating tone that can be modulated by using a microphone. Combining the right parameters and elements and transmitting it using a RF signal gets the ear to pick up the tinnitus sound and IT GETS PROCESSED BY THE BRAIN TO BE TRANSLATED INTO THINKING. Â The process can be made to run efficiently with almost immediate effect for transfer of information to your head. Â It is a way of generating a silent sound synthetic telepathic experience.
With my recording above there is proof in it that this is possible with a 2 way communication recording using an ultrasound microphone with somebody asking me to scratch (to see if my ultrasound microphone was working or not) to see if my ultrasound microphone was picking up a signal which was what was in my thinking mind at the time.
Not to complicate matters here but the 2 way silent communication on your part will come with your “speak thinking” process (where you silently speak what you think) and perhaps modulating the RF signal with an embedded tone which will then return to its source to be translated. Â In fact translation could just be a radio tuned in to the right frequency (not difficult if you sent out the signal in the first place) or like I did here use an ULTRASOUND MICROPHONE to record what is in the air.
I think in the future monitoring your space for rogue signals will be a tomorrow’s technology here today affair.