Auditory

A Beeping UFO is an aerial anomaly which also produces audible noises or beeps. In the absence of a visual sighting, care must be taken to rule out terrestrial/animal sources such as birds or bats.

A disembodied voice is a sound which resembles the utterances of a human being, yet has no identifiable origin. This differs from Electronic Voice Phenomenon in that the voice is in the range of human hearing and is, as such, witnessed by an observer who is present during the occurrence.

A supernatural entity which accurately imitates the words, phrases, or sentences of a living person using in his or her own voice or imitates the sounds of an animal. This could be considered to be an example of a type of Doppelgänger.

A noise or sound with no discernible human cause. An example would be the sound of an object hitting the floor or the swish of fabric.

This phenomenon has multiple aspects:

1. The sound of music from an unidentifiable source, usually near but sometimes farther away from the listener. The music may appear to be played by a single instrument or an entire band. Usually the songs are not contemporary, supporting the claim the sound is not electronically produced, i.e. coming from a modern radio station.
2. A separate musical phenomenon involves an investigator who plays music relating to the era when a location was occupied which then produces heightened, observed paranormal activity (e.g era cues).
3. Another aspect of this phenomenon is the occurrence of a song (with established ties to a deceased person) which plays on a radio in a synchronistic manner in relation to other events.