Mystery noise

Is the mystery of “The Hum” solved?

Photo credit: eutrophication&hypoxi licensed under CC BY 2.0

News.com.au reports that scientists believe they have discovered the source of the mysterious hum that “can drive [some] people to the brink of madness.” For those who can hear it, “‘The Hum‘ can cause sleepless nights, stress and nosebleeds and is described as a relentless ‘kind of torture’ with no explanation.” Various theories have been bandied about as to the source–submarines, gas pipes, and even mating fish–but in the end the explanation is far less fanciful. Scientists Fabrice Ardhuin, Lucia Gualtieri, and Eleonore Stutzmann believe that the “microseismic activity, recorded everywhere on Earth, is largely due to ocean waves.” So how do ocean waves make the hum? The scientists postulate that “the pressure of the waves on the sea-floor causes the earth to vibrate like a bell and creates a sound that is heard more by some than others.”

Of course the answer won’t bring relief to those who suffer from the hum (known as “hummers”), but it may help them from being misdiagnosed with tinnitus.

 

 

“Health attacks” by inaudible sonic waves are real

Photo credit: Tess Watson licensed under CC BY 2.0

James Hamblin, The Atlantic, writes about the attacks on American and Canadian diplomats in Cuba in his article, “What Are Sound Weapons?” Hamblin starts his piece by describing the incidents which caused several Havana-based diplomats to suffer headaches, balance issues, and even severe hearing loss. Secretary of State Rex Tillerson, Hamblin notes, refered the to incidents as “health attacks.” And the AP reported that “U.S. officials concluded that the diplomats had been attacked with an advanced sonic weapon that operated outside the range of audible sound and had been deployed either inside or outside their residences.”

The weaponization of “energy waves with frequencies outside the range that the human ear can detect” is not new, writes Hamblin, and the health effects from exposure to inaudible sonic waves are real. Hamblin shares the story of residents of Kokomo, Indiana, who in 2001 experienced “annoyance, sleep disturbance, headaches, and nausea.” The U.S. National Institutes of Health investigated the matter but “couldn’t pin down the cause of the Indiana residents’ symptoms as infrasound.” The report, however, “did confirm that infrasound can cause fatigue, apathy, hearing loss, confusion, and disorientation.”

In the end, U.S. officials don’t know if Cuba is responsible or some third party, with the suggestion offered that the actor could have been “Russia, China, North Korea, Venezuela, or Iran.” But Hamblin adds that the attack is hardly sophisticated, as “[n]oise-induced hearing loss affects around one in four people,” although the source of noise is more mundane for most of us: loud concerts, shooting guns, and everyday failures to protect our hearing. Says Hamblin, “fascination with this sort of attack can be a reminder that it is worth arming ourselves in daily life against the more quotidian forms of sonic weaponry.”

Yet another mystery noise. This time up north:

Canadian army investigates mysterious Arctic noise. Phys.org reports that the Canadian Army has been dispatched to investigate a strange beeping noise heard several times by Inuit hunters off the Fury and Hecla Straight. One theory was that the sound was made by marine mammals, because the strait is “usually frequented by narwhals, bowhead whales, ringed seals and bearded seals.” But the Inuit said that there were no animals left, as they all disappeared last year.  What is known is that the noise is loud and “it comes from the bottom of the sea.”  Although an initial investigation found no anomalies and the case was closed, the Canadian military decided to address Inuit concerns by sending two acoustic specialists to join a previously scheduled Canadian Rangers patrol to investigate further. And so the mystery noise remains a mystery, for now.

 

Nature is remarkable:

This is what a frozen lake sounds like.  , The Verge, writes about “one of the coolest sounds you can hear. A frozen lake that looks like it’s been stopped in time, but in fact keeps shifting and moaning sounding like a Star Wars blaster.”  Sadly, she didn’t have equipment to record the sound, but she found a good example online:

Amazing natural ice pressure sounds of the Gun Lake in British Columbia, recorded by @Mesmerizingsounds.

Enjoy!

 

Mystery noise no longer mysterious:

The mystery of the ‘alien call’ deep in the Mariana Trench is solved. So, what’s the answer?  , wired.co.uk, writes that scientists at Oregon State University’s Hatfield Marine Science Centre, which named the sound the “Western Pacific Biotwang,” “likely represents the discovery of a new baleen whale call.”  So mystery (sorta) solved!

Yet another mystery noise:

ice-sheet

Canadian military probes mysterious Arctic pinging noise.  The BBC reports that the “Canadian military has investigated a mysterious pinging sound coming from the sea floor in a remote region of the Arctic.”  The sound has also been described as a beep or hum.  Whatever the source, the noise is scaring away animals, which is a problem for the indigenous people who live and hunt in the area.  The Canadian press has put forth a number of explanations including the following:

  • It is a sonar survey conducted by a mining company

  • It is being generated on purpose by Greenpeace to scare wildlife away from the rich hunting ground

  • It is caused by military submarines

Deepening the mystery is that mining companies, Greenpeace, and the military have either denied responsibility or have claimed no presence in the area where the noise has been heard.

Given how quickly Arctic ice has been melting, one wonders if the sound could have a wholly natural source like deep ice splintering or calving.  Thoughts?

Man calls police to investigate loud noise, and

it turns out to be hedgehogs having sex.  So how just how loud were these hedgehogs?  According to Metro, “[t]heir lovemaking was so passionate – and noisy – that the homeowner called police to report the mysterious ‘loud panting’ noise.”  The police quickly found the pair in flagrante delicto and the (obviously frustrated) hedgehogs scampered away upon discovery.