The cause of many people's madness, directly and indirectly. This category covers development of devices that cause someone to think they have heard a voice, that's not coming from them, without vibrating the ear drums. The sound you perceive is very difficult to tell apart from things you have thought about verbalising yourself. Please note; there are other ways to make people hear a voice, such as organic suggestion and also that the symptom of hearing voices has been said to be an issue historically, before this invention category existed.
The first patent regarding the Radio Hearing Effect (RHE). It claims to cause the sensation of hearing in a totally deaf person using Radio Frequency (RF). The patent mentions how when Audio Frequency (AF) is applied as well, it feels like you are actually hearing the sound.
This device causes the sensation of hearing by using electrodes to administer electrical pulses with frequencies in the microwave range (not microwave radio).
This is a significant one, one of the first to use a microwave device capable of causing someone to hear a specific sound, "representative" of the transmitted sound.
A non-specific sound is caused as a "sensation of hearing" in someone's head with microwave radio waves resonating in the auditory cortex.
"A system enabling individuals to communicate by way of monitored brain activity." By comparing the signals with previously recorded signals, you can work out what a person is thinking and potentially use some version of the radio hearing effect to reply. It is not apparent what type of thought it can cause a person to hear to enable communication, or if other types of thought than the sensation of hearing can be transmitted but seems to indicate that its possible to receive other types of thought. A mechanism for transmitting speech has not yet been patented.
A method of encoding speech using the Radio Hearing Effect, the effect where specific radio frequencies can cause the perception of hearing a sound in a auditory cortex.
A mechanism to cause specch that sounds like it comes from inside you, and now to enable communication with the technique.
A targeting system that can be used to directionally target individuals for the microwave radio waves that cause the Radio Hearing Effect.