Please briefly describe the process by which a person hears the sound from a radio.

Radio through the speaker will sound signals into the air, air mechanical vibration, carrying the radio sound information vibration through the air conduction into the human ear canal, and vibration of the human ear tympanic membrane, the tympanic membrane and the vibration of the induction of the cochlea and the subsequent transfer of nerve tissue, and ultimately the nerve tissue will be the signal transmitted to the brain, the person will hear the sound of the radio.