How Infrasound Could Explain Your Paranormal Experiences

Infrasound is one of those things we’re all taught in high school science that we think we’ll never need to know about later in life. Then, we get interested in the paranormal, and suddenly, infrasound is mentioned in relation to hauntings — sometimes as a cause, sometimes as a way to boost activity, and even as a proposed frequency range for spirit communication.

Infrasound refers to sound waves with frequencies below 20 Hz, the lower limit of human hearing. When we talk about the frequency of a sound, we mean its pitch. So infrasound is deep bass tones that are just too deep for our ears to pick up, even when they are very loud. Infrasound is so low in frequency that it is usually felt rather than heard, like when you stand in front of a speaker in a nightclub and you can feel the bass in your chest. These low-frequency sounds can travel long distances and penetrate through solid objects, making them particularly interesting in the study of the environment and even paranormal investigations. They can be produced by natural events like earthquakes. Seismic activity produces significant amounts of infrasound. When the Earth’s crust shifts and releases energy, it generates infrasound waves that can be detected long before the seismic waves that cause the shaking reach the surface.

Other natural causes of infrasound include volcanic eruptions, ocean waves, avalanches, meteors entering the Earth’s atmosphere, and severe weather such as thunderstorms, strong winds, tornadoes, and hurricanes. Auroras are also a source of infrasound. The natural light display of auroras, caused by charged particles from the Sun interacting with the Earth’s atmosphere, can also generate infrasound. This is due to the energy release and movements in the upper atmosphere. There are also human-made sources such as explosions, machinery, and even wind turbines.

Some paranormal researchers suggest that infrasound can affect people in ways that might explain certain reports of ghost sightings and eerie feelings in supposedly haunted locations. Because infrasound can cause physical sensations such as vibrations in the chest, feelings of anxiety, or a sense of unease, it is believed that these sensations could be misinterpreted as paranormal phenomena.

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