Yes, people can experience a phenomenon known as "musical imagery" or "audiation," where they hear music in their mind without any external auditory stimulus. This is not considered an auditory hallucination, as it is a normal and common mental experience for many individuals.
Musical imagery can take various forms, such as hearing a song's melody, specific instruments, or even an entire musical composition. It can occur spontaneously or be triggered by external stimuli like hearing a familiar tune, thinking about a song, or recalling a particular musical experience. Some people may even have the ability to manipulate and create music in their minds.
Musical imagery is a natural cognitive process and is associated with various aspects of music perception and memory. Musicians, in particular, often use musical imagery during practice or composition to mentally rehearse and explore musical ideas. Additionally, people may experience involuntary musical imagery, commonly known as an "earworm," where a snippet of a song gets stuck in their head and repeats involuntarily.
Overall, musical imagery is a fascinating aspect of human cognition and creativity, and it contributes to our rich experiences with music.