Hypnagogia

Hypnagogic imagery is often auditory or has an auditory component. Like the visuals, hypnagogic sounds vary in intensity from faint impressions to loud noises, such as crashes and bangs (exploding head syndrome). People may imagine their own name called or a doorbell ringing. Snatches of imagined speech are common. While typically nonsensical and fragmented, these speech events can occasionally strike the individual as apt comments on – or summations of – their thoughts at the time. They often contain wordplay, neologisms and made-up names. Hypnagogic speech may manifest as the subject’s own ‘inner voice’, or as the voices of others: familiar people or strangers. More rarely, poetry or music is heard. - Wikipedia