Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Vuvuzelas: Earplugs Recommended

07.11.2011
Vuvuzelas blasted into the publics’ ears and awareness during the 2010 FIFA (Fédération Internationale de Football Association) World Cup in South Africa. One immediate question asked was: Do vuvuzelas, those cheap horns commonly made of plastic and blown by enthusiastic fans during sporting events, pose serious risks to hearing?

A group of researchers from the Southern Polytechnic State University (SPSU) in Marietta, Georgia, and the Georgia Institute of Technology (Georgia Tech) in Atlanta, investigated vuvuzelas’ acoustics and their potential impacts on hearing and will present their findings at the Acoustical Society of America’s upcoming 162nd annual meeting in San Diego, Calif., Oct. 31-Nov. 4, 2011.

What the researchers found is that the sound levels from single horns ranged from 90 to 105 decibels at the players’ ears. They also discovered that the horns’ impact is greatest when blown simultaneously with many others, such as at the World Cup, where the levels within an audience may well approach 120 decibels.

“For perspective, 100 decibels is the level of noise you’d hear at a rock concert. An ambulance siren or pneumatic jack hammer produce about the same level of noise as the vuvuzelas in a stadium, 120 decibels, which is at the threshold of feeling and produces a tickling sensation in your ears,” explains Richard Ruhala, associate professor and program director of mechanical engineering at SPSU. “The threshold of pain is 140 decibels. Sustained exposure to 120 decibels is 1,000 times the acoustic energy that causes hearing loss (with long-term exposure). That’s why OSHA [Occupational Safety and Health Administration] requires people working near those noise levels to wear hearing protection.”

... more about:
»Acoustical Society »Earplugs »SPSU »Vuvuzelas

Ruhala worked with his wife Laura Ruhala, also a researcher at SPSU, and Kenneth Cunefare, a professor of acoustics at Georgia Tech, to record the sound levels produced by a number of vuvuzelas, including one that had been used at the 2010 World Cup.

“On the field of play, with just a few percent of a stadium’s audience blowing vuvuzelas, the predicted levels could exceed 90 decibels, which is a level that would interfere with communication between players and impair their ability to hear the calls of officials,” points out Cunefare. “At the end of the day, though, the use of these horns at sporting events is maybe as much a cultural and participation choice as anything else. Perhaps there’s a product marketing opportunity here: Hearing protectors for sale at sporting venues in each teams’ colors?”

The researchers are continuing their work, analyzing the precision sound power and directivity of measurements already obtained. They’re also zeroing in on creating more accurate sound models to evaluate the sound pressure levels vuvuzelas produce in a stadium, thanks to the aid of Tina Ortkiese, an acoustic engineer.

The paper 5aNSb1, “Vuvuzelas and their impact,” will be presented Friday morning, Nov. 4.

USEFUL LINKS:
Main meeting website: http://acousticalsociety.org/
Searchable index: http://asa.aip.org/asasearch.html
Hotel site: http://www.towncountry.com/index.cfm
Webcast registration and viewing: http://www.aipwebcasting.com
WORLD WIDE PRESS ROOM
In the week before the meeting, the ASA's World Wide Press Room (www.acoustics.org/press) will be updated with lay-language papers, which are 300-1200 word summaries of presentations written by scientists for a general audience and accompanied by photos, audio, and video.
PRESS REGISTRATION
The Acoustical Society will grant free registration to credentialed full-time journalists and professional freelance journalists working on assignment for major news outlets. If you are a reporter and would like to attend, contact Charles E. Blue (cblue@aip.org, 301-209-3091), who can also help with setting up interviews and obtaining images, sound clips, or background information.
ABOUT THE ACOUSTICAL SOCIETY OF AMERICA
The Acoustical Society of America (ASA) is the premier international scientific society in acoustics devoted to the science and technology of sound. Its 7,000 members worldwide represent a broad spectrum of the study of acoustics. ASA publications include The Journal of the Acoustical Society of America (the world's leading journal on acoustics), Acoustics Today magazine, books, and standards on acoustics. The society also holds two major scientific meetings each year. For more information about ASA, visit our website at http://www.acousticalsociety.org

Charles E. Blue | Newswise Science News
Further information:
http://www.aip.org

Further reports about: Acoustical Society Earplugs SPSU Vuvuzelas

More articles from Physics and Astronomy:

nachricht Mars 2020 mission to use smart methods to seek signs of past life
17.08.2017 | Goldschmidt Conference

nachricht Gold shines through properties of nano biosensors
17.08.2017 | American Institute of Physics

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

Gold shines through properties of nano biosensors

17.08.2017 | Physics and Astronomy

Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter

17.08.2017 | Earth Sciences

Mars 2020 mission to use smart methods to seek signs of past life

17.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>