Tag Archive: China

Another study shows association of hearing loss with cognitive decline

Photo credit: Xiaofan Luo licensed under  CC BY-NC-SA 2.0

by Daniel Fink, MD, Chair, The Quiet Coalition

We have reported previously on associations between hearing loss and dementia in the U.S., and studies finding brain changes associated with decreases in auditory input due to hearing loss. Hearing loss is also associated with depression.

This study from China, published in JAMA Network Open, confirms these associations in a different population. The China Health and Retirement Longitudinal Study is following a nationally representative survey of adults age 45 and older, and their spouses. The current study looked at data from 18,038 participants with an average age of 59.9. Hearing impairment was associated with worse performance in episodic memory, mental intactness, and global cognition and a greater risk of depression.

Correlation is not causation, but this report from another country with a different language and culture confirms studies in the U.S. and Europe. It’s another piece of the puzzle in trying to understand why some people develop certain problems as they age. Research is ongoing to elucidate how hearing loss contributes to or causes cognitive decline, and whether providing hearing aids can prevent or slow cognitive decline.

In the meantime, we urge people to protect their hearing as assiduously as they protect their vision. We don’t stare at the sun. We wear sunglasses when outdoors. And we should view hearing loud noise just like staring at the sun. Loud noise is as dangerous for the ears as the sun is for the eyes.

Because if something sounds loud, it’s too loud, and auditory health is in danger.

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.

Could noise be a risk factor for hypertension?

Photo credit: Kateryna Babaieva from Pexels

by Daniel Fink, MD, Chair, The Quiet Coalition

Could noise be a risk factor for hypertension? This fascinating study from Chengdu, China, suggests that the answer is yes. The study design is innovative. The investigators measured bilateral high frequency hearing loss (BHFHL) and blood pressure in 21,000 workers, with an average age of 40. Hearing loss was a proxy measure for occupational noise exposure. Workers with greater hearing loss, as measured by audiometric tests, had a greater risk of also having high blood pressure.

The study is an exploratory one, and it is cross-sectional, i.e., the workers were not followed for decades and the study is based on one-time measurements of hearing and blood pressure. Other factors known to be associated with hypertension, such as weight and alcohol consumption, were not documented. And only a proxy measure of occupational noise exposure, bilateral high frequency hearing loss, was used, rather than actual noise measurements in the workplace. But the number of workers studied was large enough to provide high statistical significance, and the results were striking. As the researchers noted, “subjects having mild and high BHFHL had a higher hypertension risk of 34% and 281%, respectively (both P<0.001). Dose-response relationship between BHFHL and hypertension was found in both males and females.”

Studies done in the U.S. also show a correlation between occupational noise exposure and hypertension. The Chinese study may show a stronger relationship between occupational noise exposure and hypertension because workplace protections and their enforcement may be less stringent in China than in the U.S.

What are the implications of this study for public health? More than 100 million Americans have high blood pressure. At least two studies show that noise exposure in everyday life is great enough to cause hearing loss. Is it also great enough to contribute to the epidemic of hypertension in the U.S.?

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.

The odd saga of the “sonic attacks” continues

Photo credit: jo.sau licensed under CC BY 2.0

Vice News writes that the U.S. government has pulled out diplomats from a station in Guangzhou, China, “after one official suffered mild traumatic brain injury, sparking fears that U.S. government personnel in China were being targeted using the same methods that forced 24 U.S. officials to flee the Caribbean island in 2017.”

As in the earlier case, there has been no official explanation, instead the authorities issue medical alerts and statements assigning blame to Cuba or Russia or China. Vice News put together a timeline of this very odd 18-month old story.  As Vice notes in one entry from January 2018:

Sen. Marco Rubio, who chaired the U.S. Senate Foreign Relations Subcommittee hearing into the attacks, called the weapon being used “very sophisticated technology that does not exist in the U.S. or anywhere else in the world” — despite no evidence that these weapons exist.

Given the enormous amount of money the U.S. spends on its military and intelligence, how likely is it that no one knows exactly what these phantom “sonic weapons” are or how they operate? It just feels like there’s something missing from this ongoing story, making it hard to accept the conclusion that “sonic weapons” are the source of the “mild traumatic brain injuries,” whatever this means.  Are we being too skeptical or do you agree?

An interesting look at the cultural response to noise

Photo credit: Julian Mason

In “Living loud in China’s lively public spaces,” , BBC News, writes about noise in China’s bustling cities. McDonnell states that “[t]here is something incredible about the way in which societies, cities, subcultures find their level in terms of acceptable public volume.”  For example, he notes that there are “bustling cities – rammed with millions of people – where you could be frowned upon for disrupting others with a raised voice: Seoul, London, Tokyo… especially Tokyo.” But McDonnell has lived the last 12 years living in China, where, he notes:

There are some societies where people are expected to avoid being noisy in public and they behave accordingly. Then there’s China.

He describes the “cacophony of chaos” he experiences in a cafe, where someone “starts a phone call at the top of their voice,” as two buddies loudly play video games on their phones, and “a young convert to Christianity sits down next to [him] and starts praying” just as a nearby “hippie looking Chinese bloke has booted up his laptop and Coldplay starts belting out of the speakers.”  This experience is not atypical, he writes, and adds that, looking around, “nobody but me has reacted as if this is anything but completely normal.”

Interestingly, he says that there is only one other city where he has seen this phenomenon–New York–where he describes a similar experience in a diner.  McDonell ponders, “[m]aybe you have to speak up in order to be heard amongst a huge population?”  That is, maybe it’s the space and not just the culture that determines the “acceptable public volume?” After all, he asks, “what noise does a Chinese farmer have to compete in the field?”

 

Noise complaints about a city park?

In China, the ‘Noisiest Park in the World’ Tries to Tone Down Rowdy Retirees.

Click the link to read the article, which discusses interesting cutlrual difference between the U.S. and China with respect to parks.  In the U.S. we are more like to see parks as places for quiet enjoyment, whereas parks in China, and certainly the one highlighted in the article, are places where people, often retirees, meet to for collective activities, such as singing and dancing.  It is also interesting to see that older people are the cause of the noise rather than the ones complaining about it.

Thanks to Heather Maloney, @thegalonthego, for the link.