Infrasäveliksi

Infrasäveliksi is a Finnish term that translates to "infrasound" or "sub-bass" in English. It refers to sound frequencies that are below the range of human hearing, typically considered to be below 20 Hz. While humans cannot consciously perceive these low-frequency sounds, they can be generated by various natural and artificial sources. Natural sources include earthquakes, volcanic eruptions, avalanches, and powerful ocean waves. Artificial sources can include wind turbines, large industrial machinery, and even some types of musical instruments or audio systems designed to produce very low bass tones.

The study of infrasound is known as infrasound acoustics. Researchers investigate infrasound for several reasons. It can be used to monitor atmospheric phenomena and geological events, as its long wavelengths allow it to travel great distances with little attenuation. For instance, infrasound detectors are employed in nuclear test ban verification. In some contexts, infrasound has been anecdotally linked to feelings of unease or unusual experiences, though scientific explanations for these claims often involve physiological effects or psychological responses rather than direct perception of the sound itself. The precise physiological and psychological impacts of prolonged exposure to infrasound are areas of ongoing research.