``` Silent Talk (U) Silent Talk will allow user-to-user communication on the battlefield without the use of vocalized speech through analysis of neural signals. The brain generates word-specific signals prior to sending electrical impulses to the vocal cords. These signals of “intended speech” will be analyzed and translated into distinct words, allowing covert person-to-person communication. This program has three major goals: a) to attempt to identify electroencephalography patterns unique to individual words, b) ensure that those patterns are generalizable across users in order to prevent extensive device training, and c) construct a fieldable pre-prototype that would decode the signal and transmit over a limited range. ``` https://commons.wikimedia.org/wiki/File:Fiscal_Year_2010_DARPA_budget.pdf

``` The preceding sections document that an audible sound originates from within the head when human subjects are exposed to pulsed microwave radiation. The auditory detection of pulsed microwaves in laboratory animals has been confirmed both in behavioral and neurophysiological studies. The site of microwave-to-sound conversion is shown to be in the brain tissue. The primary mechanism of interaction is microwave pulse-induced thermoelastic expansion of brain matter. ```

https://ieeexplore.ieee.org/document/9366412

``` The envisioned application is radiomyography which aims to detect muscular activity by the means of electromagnetic waves coupled into the human body. The paper concludes that it is possible to detect changes in the thickness and the properties of the muscle solely by evaluating the reflection coefficient of an antenna structure. The ability to detect these changes strongly depends on the antenna type. ```

https://ieeexplore.ieee.org/document/6711930