Apparently this is a thing that was used in old horror movies.
Subsonic music would play just before a scary encounter, creating a feeling of uneasiness to the audience without any consciously perceptible stimulous, and thus priming the audience for the horror to come.
Subsonic music would play just before a scary encounter, creating a feeling of uneasiness to the audience without any consciously perceptible stimulous, and thus priming the audience for the horror to come.