The Hum - The mysterious sound challenges the scientific world

Named The Hum, the oddly low low frequency sound is only heard by 2% of the population in isolated places.

According to Live Science, the cause of The Hum and the reason it only affects a small portion of people in some areas is still a mystery, although scientists have done a lot of research.

The report began to be recorded in the 1950s from people who had never heard such unusual sounds before. They were suddenly tortured by an unpleasant low-frequency sound like a roaring or rumbling roar.

The case has some things in common.The Hum only resonates in the house and is bigger at night than in the daytime. It is most popular in rural or suburban areas. Very few people in the inner city reported on this sound, possibly due to stable background noise in crowded cities.

Bristol, England, is one of the first places on Earth to report on The Hum. In the 1970s, about 800 people in this coastal city said hearing the steady slapping of the researchers attributed the 24-hour traffic to vehicles and local factories.

Another famous place where The Hum is present is Taos town in New Mexico, USA. Beginning in the spring of 1991, residents in the area reflected a low low rumble. The team came from Los Alamos National Laboratory, New Mexco University, unable to identify the source of the sound.

The Hum low frequency sound The annoying for listeners.(Photo: Facebook).

Other places where The Hum is found are Windsor, Ontario, USA and Bondi in Sydney, Australia."It drives people around here crazy. All you can do is turn on the music or cover your ears. Some people let fans run continuously," Telegraph quoted a resident in Bondi.

Only about 2% of people living in the discovery area of ​​The Hum hear sounds, most of them are in the age of 55-70, according to a 2003 study by audio advisor Geoff Leventhall in Surrey, England.

The majority of people who hear The Hum describe sounds similar to the sound of a diesel engine running close by. The cry really makes people desperate.

"It's a torture. Sometimes, you just want to shout , " Katie Jacques, a retired resident of Leeds, England, told the BBC. "It was the worst at night. It was very difficult to go back to sleep because I heard the throbbing sound behind me. The more you turned and turned on yourself, the more you heard it and the more excited it became." .

Most of the Hum's victims have normal hearing. They often complain about headaches, nausea, dizziness, nosebleeds and sleep disorders. At least one suicide case in the UK is thought to be caused by The Hum, according to BBC.

The Hum researchers can express their views that this phenomenon is real, and not the result of the listener's hysteria or paranoid syndrome.

Industrial equipment was the first source suspected of releasing The Hum. In one case, Leventhall found the sound coming from the central heating system in the neighboring building.

Other sources of doubt include high-pressure air lines, power lines, and wireless communication equipment . However, in only a few cases, The Hum is related to electronic or mechanical equipment.

Researchers also speculate The Hum may be the result of low frequency electromagnetic radiation that only a few people hear. In many cases, individuals have special sensitivity to signals that are beyond the normal hearing threshold of humans.

Medical experts pointed out that tinnitus is the right answer, but repeated tests reveal that many victims are able to hear normally and do not experience tinnitus.

They also mentioned environmental factors including seismic activity such as seismic vibration, weak low-frequency vibrations in the ground caused by ocean waves.

Another theory is that military and submarine communications are not yet confirmed. Currently, people who hear The Hum must rely on noise-canceling machines and other devices to minimize or eliminate this annoying sound.