The "Hum" May Be a Form of Low-Frequency Tinnitus, New Study Suggests
A new study by researchers at the German Center for Vertigo and Balance Disorders (DSGZ) and the Norwegian University of Science and Technology offers a potential explanation for the mysterious low-frequency sound known as "The Hum."
The research, published in PLOS One, suggests that many reports of this unexplained phenomenon may actually be a form of low-frequency tinnitus.
The Study's Approach
Investigators recruited 28 volunteers who reported hearing persistent low-frequency sounds without any identifiable external source. Each participant underwent comprehensive hearing tests and measurements of otoacoustic emissions—sounds generated naturally within the inner ear.
Key Findings
The results showed that most participants had average low-frequency hearing sensitivity, and their otoacoustic emissions were normal. The researchers concluded that exceptional hearing or internal ear sounds were unlikely explanations for most cases.
"Subjective tinnitus in the low-frequency range may often cause these perceptions."
Lead author Markus Drexl stated that subjective tinnitus in the low-frequency range may often be the root cause. The researchers noted that low-frequency tinnitus is underrecognized but could serve as a plausible explanation for many cases of The Hum.
A Path Forward
Recognizing The Hum as a form of tinnitus could open pathways to existing treatments and coping strategies. This reframing may help affected individuals access established therapies that are currently underutilized for this specific complaint.