Sounds, too, follow the same principle, being merely vibrations of different frequencies and intensities, which the auditory system receives and the brain identifies. Many animals' auditory systems can perceive a much broader range of frequencies than humans. Strictly speaking, there are no sounds in nature, only vibrations, including Wi-Fi, Bluetooth, 5G signals, FM radio broadcasts; these are all vibrations, just imperceptible to human hearing.
The human auditory system converts vibrations within certain frequencies into electrical signals that are sent to neuronal brain cells, and this impressive brain automatically "fills in" the sounds corresponding to those frequencies and translates them into language, making everything seem so natural, so objective, so real.
