Search results
Results from the WOW.Com Content Network
The U.S. Environmental Protection Agency authored a pamphlet in 1978 that suggested a correlation between low-birthweight (using the World Health Organization definition of less than 2,500 grams (88 oz)) and high sound levels, and also high rates of birth defects in places where expectant mothers are exposed to elevated sound levels, such as ...
Long-term fatigue is defined as full recovery from temporary threshold shifts taking at least several minutes to occur. Recovery can take up to several days. Threshold shifts that result in long-term fatigue are dependent on level of sound and length of exposure. [7]
Before hearing protective actions will take place, a person must understand they are at risk for NIHL and know their options for prevention. Hearing protection programs have been hindered by people not wearing the protection for various reasons, including the desire to converse, uncomfortable devices, lack of concern about the need for ...
Normal human ears can discriminate between two frequencies that differ by as little as 0.2%. [14] If one ear has normal thresholds while the other has sensorineural hearing loss (SNHL), diplacusis may be present, as much as 15–20% (for example 200 Hz one ear => 240 Hz in the other).
One day, Americans will be able to use high-tech headlights that can do more than just make light shows. Clarification: This story has been updated with the SAE’s new name. For more CNN news and ...
Although the ear is the primary organ for sensing low sound, at higher intensities it is possible to feel infrasound vibrations in various parts of the body. The study of such sound waves is sometimes referred to as infrasonics , covering sounds beneath 20 Hz down to 0.1 Hz (and rarely to 0.001 Hz).
AOL Promotions. You’ll no longer see paid ads, but you’ll continue to see promotions for AOL products and brands. We want to keep you in-the-know of our latest product news and information.
This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. Claimed sensitivity to electromagnetic fields This article is about a pseudomedical diagnosis. For the recognized effects of electromagnetic radiation on human health, see Electromagnetic radiation and health. Electromagnetic hypersensitivity Idiopathic environmental intolerance ...