Tag Archive: hearing damage

AARP focuses on musicians and hearing loss

Photo credit: Alex G licensed under CC BY 2.0

by David M. Sykes, Vice Chair, The Quiet Coalition

Noise-induced hearing loss afflicts people of all ages, but since it’s cumulative and incurable, the greatest burden falls on older people who have incessantly exposed themselves to loud noise in their careers and due to recreational choices. Such is the case with many stars in music and entertainment. AARP recently reviewed research from Germany that analyzed the heath insurance records of 7 million people from 2004 to 2008 and found that “working musicians are nearly four times more likely to suffer noise-induced hearing loss than those in any other profession”…. and they were “57% more likely to have tinnitus brought on by their work.”

Hearing Health magazine also recently reported on this and included a list of a dozen well-known performers who’ve given up music due to hearing loss.

So if you’re wondering why some of your favorite rock stars aren’t touring any more, it’s possible they simply can’t hear what they’re performing. Sure, everybody knows classical composer Ludwig von Beethoven wrote—and even conducted–some his finest work after he was completely deaf. But if you’ve read about him, you would also know how profoundly unhappy he was about it.

Our ability to hear isn’t self-repairing–once you’ve blown your ears, they’re gone for good. So it’s good news that AARP seems to be awakening to the problem of noise-induced hearing loss. They’re big and powerful enough to get things done in Washington DC, where the health effects of exposure to loud sound was swept under the rug nearly 40 years ago. It’s definitely time for AARP to pay attention!

David Sykes chairs several professional organizations in acoustical science: QCI Healthcare Acoustics Project, ANSI Committee S12-WG44, the Rothschild Foundation Task Force on Acoustics, and the FGI Acoustics Committee. He is lead author of “Sound & Vibration 2.0” (Springer, 2012), a contributor to the NAE’s “Technology for a Quieter America” and the GSA’s “Sound Matters,” and co-founded the Laboratory for Advanced Research in Acoustics at Rensselaer Polytech. A graduate of UC-Berkeley with advanced degrees from Cornell, he is a frequent organizer of professional conferences in the U.S., Europe, Asia and the Middle East.

Why are spin classes so loud (and does it matter)?

Photo credit: Aberdeen Proving Ground licensed under CC BY 2.0

by Daniel Fink, MD, Chair, The Quiet Coalition

Why are spin classes so loud? This post on The Cut doesn’t really answer that question, but it does a nice job of explaining the dangers of excessive noise for auditory health.

A few years ago I had email exchanges with two researchers who study the effects of noise on athletic performance. Music with a specific beat can help rhythmic activities, like running or spinning at a constant pace, but despite common belief there is no evidence that loud music makes anyone run faster or lift more weight, or in this case spin faster.

Even if music does improve performance–or people think it improves their performance–those theoretical advantages are outweighed by almost certain auditory damage, including hearing loss and tinnitus.

I’m glad the author of this piece had a best friend who became an audiologist and educated her about the dangers of noise. Because if the noise in your spin class–or any exercise class, or really anywhere at all–sounds too loud, it is too loud.

And if the noise is loud enough to be painful, it’s dangerous for your ears. Period.

Dr. Daniel Fink is a leading noise activist based in the Los Angeles area. He is the founding chair of The Quiet Coalition, an organization of science, health, and legal professionals concerned about the impacts of noise on health, environment, learning, productivity, and quality of life in America. Dr Fink also is the interim chair of Quiet Communities’ Health Advisory Council, and he served on the board of the American Tinnitus Association from 2015-2018.

Justice prevails: Federal court rules sound cannon can be excessive police force

Alex Pasternack, Fast Company, reports on a recent U.S. Court of Appeals for the 2nd Circuit decision that ruled “[a] powerful speaker that’s capable of causing hearing damage and is used by a growing number of police around the world isn’t merely a ‘communication device’ but, potentially, an instrument of excessive force.” The court was addressing the appeals of two New York City police officers who were seeking qualified immunity in a lawsuit that accused “them of using unconstitutionally excessive force when they deployed a Long Range Acoustic Device (LRAD) at a Black Lives Matter protest in 2014.”

The 2nd circuit affirmed a decision last June in which District Court Judge Robert Sweet, of the southern district of New York, ruled that the sound emitted by a long-range acoustic device (LRAD) used by the New York City Police Department to order protestors onto sidewalks “could be considered a form of force.”

Chief Judge Robert Katzmann, writiing for the 2nd circuit, found that “purposely using an LRAD in a way that can cause serious injury in order to move non-violent protesters violates the Fourteenth Amendment.” Judge Katzmann added that, “this Court’s longstanding test for excessive force claims teaches that force must be necessary and proportionate to the circumstances … [T]he problem posed by protesters in the street did not justify the use of force, much less force capable of causing serious injury, such as hearing loss.”

It is never acceptable for any police force to use sound cannons against non-violent protestors. Period.

Bicyclists at risk of hearing loss

By Daniel Fink, MD, Chair, The Quiet Coalition

A new study shows that bicycle riders may be at risk of hearing loss, and the culprit is wind noise. The study by Dr. Michael Seidman, an ear specialist who also is a bicycle rider, measured sound levels in a wind tunnel, finding that under many conditions noise level were high enough to cause auditory damage. The measurements need to be replicated on the road, which is a more challenging endeavor.

To me, the important thing to note is how Dr. Seidman conceived of the study: he was out riding with his brother and found that they had to shout at each other to be heard over the wind noise. He states that “OSHA, the Occupational Safety and Health Administration, says you can be exposed to 85dB of loudness for an eight-hour time period at work. But that does cause noise-induced hearing loss — we know that it does,” he said. “So anything over 85dB causes noise-induced hearing loss.”

I wrote about the 85 dB (actually A-weighted decibels, or dBA) occupational standard in the American Journal of Public Health, in which I noted that 85 dBA “is not a safe noise exposure level for the public.” Humans have difficulty understanding speech if the ambient noise is above 75 decibels. (Technically, those are A-weighted decibels, or dBA. That information is in Figure D-1 in the 1974 EPA “noise levels” monograph.) And Flamme et al. discussed the fact that the auditory injury threshold is only 75-78 dBA.

So, as Dr. Seidman realized, if it sounds too loud, it IS too loud. You don’t need a sound meter to know that. If you have to strain to speak or to hear conversation, the ambient noise is above 75 dBA and your hearing is being damaged.

What should bicyclists do to protect their hearing? Earplugs are an obvious choice, but Dr. Seidman says that they are illogical because “It’s not a good idea to wear earplugs when you ride — you can’t be aware of your surroundings.” He suggests that helmet design could address wind noise (but apparently isn’t offered at this time), but adds that accessories are available, such as AirStreamz Pro Cycling Wind Noise Reducer  by Cat-Ears, which are attached to eyeglasses or helmet straps and help to deflect noise.

Dr. Daniel Fink is a leading noise activist based in the Los Angeles area. He serves on the board of the American Tinnitus Association, is the interim chair of Quiet Communities’s Health Advisory Council, and is the founding chair of The Quiet Coalition, an organization of science, health, and legal professionals concerned about the impacts of noise on health, environment, learning, productivity, and quality of life in America.

Is nothing safe?

They look so innocent…

Experts Warn Popping Balloons Can Lead To Permanent Hearing Loss. Arrianne Del Rosario, Tech Times, writes about an experiment conducted by researchers at the University of Alberta “to find out how noise from bursting balloons can impact hearing,” and the results were stunning.  The researchers “measured the noise levels from popping balloons in three different ways: poking them with a pin, blowing them with air until they burst, and crushing them until they exploded.”  The loudest bang came from blowing up a balloon with air until it popped.  When it did, it was recorded at almost 168 decibels, “4 decibels louder than a high-powered, 12-gauge shotgun.”

It can’t be that bad, it’s just a balloon, right?  Wrong.  Del Rosario notes that the Canadian Centre for Occupational Health and Safety recommends that “the maximum impulse level should never go beyond 140 decibels.”  She adds that “[c]onstant exposure to noise, even as low as 85 decibels — for example, the noise from cars honking their horns in a city traffic — can make a person vulnerable to hearing loss.”

Del Rosario is right that damage to hearing can occur well under 140 decibles, but wrong to imply that damage only occurs at 85 decibels or higher.  85 decibels is the industrial-strength occupational noise exposure standard. Auditory damage can begin at only 75-78 decibels.  The only evidence-based safe noise exposure level is the EPA’s 70 decibel time weighted average for 24 hours.  Cautions noted noise activist Dr. Daniel Fink, “If it sounds too loud, it is too loud.  Hearing is an important social sense, and once cochlear hair cells and auditory synaptic junctions are damaged, they are gone forever.”

Whatever the decibel reading, the problem is that each exposure to loud noise leaves a mark.  As one of the researchers, Bill Hodgetts, advised:

Hearing loss is insidious — every loud noise that occurs has a potential lifelong impact. We want people to be mindful of hearing damage over a lifetime, because once you get to the back end of life, no hearing aid is as good as the once healthy built-in system in your inner ear.

This is fascinating:

crash-photo

Mercedes-Benz E-Class will blast pink noise at you just before an accident, to protect your ears.  That’s right, in an effort to cut down on “hearing damage caused by the deafening crunch of a car crash,” Mercedes-Benz is going to “blast[] pink noise through the stereo when you’re about to hit something.”  What will the pink noise do?  It will “trigger a fascinating physical response…known as the acoustic reflex, or stapedius reflex – an involuntary muscle contraction in the middle ear that effectively dampens the vibrational energy that’s transferred to the cochlea.”  Essentially, the reflex action will reflect some of the noise from a crash back through the ear drum, thus avoiding the inner ear.  Click the link to learn more.

 

 

 

Can’t Hear in Noisy Places? There a reason for that:

Melinda Beck, writing for the Wall Street Journal, examines hidden hearing loss, a condition where people have trouble understanding conversations in noisy situations.  Beck looks at how it differs from traditional hearing damage, reporting that:

[T]here’s growing evidence that the causes of problems processing speech amid noise are different than the causes of problems hearing sound. Scientists believe exposure to loud noises can erode the brain’s ability to listen selectively and decode words, without causing traditional hearing damage. Difficulty understanding speech amid noise can set in long before traditional hearing loss.

The researchers at Massachusetts Eye and Ear Infirmary who discovered hidden hearing loss in mice in 2009 have recently shown that damage occurs in humans as well.  “Exactly how such damage, called cochlear synaptopathy, compromises the ability to understand speech amid noise isn’t fully understood,” writes Beck, but “researchers think cochlear synaptopathy may help explain tinnitus, the persistent buzzing or ringing some people hear, as well as hyperacusis, which is an increased sensitivity to unpleasant sounds such as a baby crying or a siren.”

Apparently many people who may have hidden hearing loss also have traditional hearing loss.  Sadly, there isn’t enough information yet for hidden hearing loss to be part of routine diagnosis of hearing problems, but the research continues.  Until then, audiologists suggest patients who have speech-in-noise difficulties consider hearing aids and other assistive listening devices.

Thanks to Charles Shamoon for the link.