Basically a horror movie is made spooky (his name is also a horror movie).

The problem is that viewers who are accustomed to watching horror movies will quickly get bored with the same scene alone, thus failing to reach the thrill of fear that should have been in the movie sparking fear.

Facing it, the filmmaker certainly does not lack of sense. Many things can be done to manipulate the emotions of the audience, one of which is sound. As we know and feel, the sound of accompaniment or the soundtrack in the film has a very important role in building the atmosphere and evoking the emotions of the audience.

The music composer, in this case of course the film specialist composer, certainly already knows how to infiltrate the human brain, right in the center of his emotions, using only music and sound. More extreme than that, some horror film composers are known to have incorporated infrasonic sounds to influence the fear of the audience.

Infrasonic sound is a sound with a frequency too low to be heard by the human ear. Infrasound is in the range of 17 Hertz to 0.001 Hertz. Although inaudible, infrasonic sound has a special effect that can be felt by humans. The special effect of infrasonic sounds is what composers use to evoke emotion of audience fears (though the effect can be different for each individual). It is believed to be the effect of the use of infrasound sound waves that are shown to cause anxiety, deep sadness, palpitations, and body shivering.