A recent study published in PLOS ONE by researchers at the Norwegian University of Science and Technology (NTNU) suggests that the global hum—a low-frequency sound perceived by some people worldwide—may be linked to infrasound and environmental factors.The research, led by Dr.Markus Drexl, explores how the human auditory system processes low-frequency sounds and infrasound, which are below 20 Hz.

The study found that while the hum is not a physical sound, it could be caused by the perception of infrasound generated by natural phenomena like ocean waves, wind, or industrial activity.The team analyzed data from individuals who reported hearing the hum and found correlations with environmental factors.

They also highlighted the need for further research into how sensory systems handle low-frequency sounds, as concerns about technological noise pollution in this range have grown.The findings could have implications for understanding tinnitus and other auditory disorders.The study challenges the notion that the hum is a hallucination, instead proposing it as a real perceptual phenomenon tied to environmental stimuli.This research underscores the complexity of human hearing and the importance of studying infrasound's effects on health and well-being.