The phenomenon you are referring to is known as "RF (radio frequency) hearing" or "the microwave auditory effect." It is a relatively rare and fascinating phenomenon that occurs when radio frequency energy is converted into sound perception by the human auditory system.
The exact mechanism behind RF hearing is not yet fully understood and is a topic of ongoing research. However, several theories have been proposed to explain this phenomenon. Here are a few possible explanations:
Electrothermal Theory: According to this theory, the radio frequency energy absorbed by the body, particularly in the head and ear regions, leads to a rapid but localized heating. This thermal expansion can generate sound waves that are then detected by the auditory system.
Cochlear Microphonic Theory: The cochlea, the spiral-shaped structure in the inner ear responsible for hearing, contains hair cells that convert sound vibrations into electrical signals. It is suggested that radio frequency energy may induce a direct mechanical stimulation of these hair cells, resulting in the perception of sound.
Bone Conduction: Radio frequency energy can be transmitted through solid objects, including bones. It is possible that the radio waves could reach the inner ear through bone conduction, stimulating the auditory system and resulting in the perception of sound.
It is important to note that RF hearing is relatively rare and may vary from person to person. Factors such as individual sensitivity, specific anatomical features, and even variations in the environment or equipment being used may contribute to the occurrence of RF hearing.
It is also worth mentioning that deliberately attempting to listen to radio signals by touching a jack plug or any other conductive object can be potentially hazardous. Directly exposing yourself to high-power radio frequency signals without proper protection can lead to harmful effects, including burns and tissue damage. It is essential to prioritize safety and avoid unnecessary exposure to radio frequency energy.