83
84
9. What steps can I take to reduce my exposure to radiofrequency energy from my
wireless phone?
If there is a risk from these products—and at this point we do not know that there is—it is probably
very small. But if you are concerned about avoiding even potential risks, you can take a few simple
steps to minimize your exposure to radiofrequency energy (RF). Since time is a key factor in how
much exposure a person receives, reducing the amount of time spent using a wireless phone will
reduce RF exposure.
• If you must conduct extended conversations by wireless phone every day, you could place
more distance between your body and the source of the RF, since the exposure level drops off
dramatically with distance.
For example, you could use a headset and carry the wireless phone away from your body or use
a wireless phone connected to a remote antenna. Again, the scientific data do not demonstrate
that wireless phones are harmful. But if you are concerned about the RF exposure from these
products, you can use measures like those described above to reduce your RF exposure from
wireless phone use.
10. What about children using wireless phones?
The scientific evidence does not show a danger to users of wireless phones, including children and
teenagers. If you want to take steps to lower exposure to radiofrequency energy (RF), the measures
described above would apply to children and teenagers using wireless phones. Reducing the time
of wireless phone use and increasing the distance between the user and the RF source will reduce
RF exposure. Some groups sponsored by other national governments have advised that children
be discouraged from using wireless phones at all. For example, the government in the United
Kingdom distributed leaflets containing such a recommendation in December 2000. They noted
that no evidence exists that using a wireless phone causes brain tumors or other ill effects. Their
recommendation to limit wireless phone use by children was strictly precautionary; it was not based
on scientific evidence that any health hazard exists.
11. What about wireless phone interference with medical equipment?
Radiofrequency energy (RF) from wireless phones can interact with some electronic devices. For
this reason, FDA helped develop a detailed test method to measure electromagnetic interference
(EMI) of implanted cardiac pacemakers and defibrillators from wireless telephones. This test
method is now part of a standard sponsored by the Association for the Advancement of Medical
instrumentation (AAMI). The final draft, a joint effort by FDA, medical device manufacturers, and
many other groups, was completed in late 2000. This standard will allow manufacturers to ensure
that cardiac pacemakers and defibrillators are safe from wireless phone EMI. FDA has tested
hearing aids for interference from handheld wireless phones and helped develop a voluntary
standard sponsored by the Institute of Electrical and Electronic Engineers (IEEE). This standard
specifies test methods and performance requirements for hearing aids and wireless phones so that
that no interference occurs when a person uses a “compatible” phone and a “compatible” hearing
aid at the same time. This standard was approved by the IEEE in 2000. FDA continues to monitor
the use of wireless phones for possible interactions with other medical devices. Should harmful
interference be found to occur, FDA will conduct testing to assess the interference and work to
resolve the problem.
12. Where can I find additional information?
For additional information, please refer to the following resources:
• FDA web page on wireless phones
(http://www.fda.gov/Radiation-EmittingProducts/RadiationEmittingProductsandProcedures/
HomeBusinessandEntertainment/CellPhones/default.htm)
• Federal Communications Commission (FCC) RF Safety Program (http://www.fcc.gov/oet/
rfsafety)
• International Commission on Non-Ionizing Radiation Protection (http://www.icnirp.de)
• World Health Organization (WHO) International EMF Project (http://www.who.int/peh-emf/en/)
• National Radiological Protection Board (UK) (http://www.hpa.org.uk/radiation/)
AVOID POTENTIAL HEARING LOSS
Prolonged exposure to loud sounds (including music) is the most common cause of preventable
hearing loss. Some scientific research suggests that using portable audio devices, such as portable
music players and cellular telephones, at high volume settings for long durations may lead to
permanent noise-induced hearing loss. This includes the use of headphones (including headsets,
earbuds and Bluetooth® or other wireless devices). Exposure to very loud sound has also been
associated in some studies with tinnitus (a ringing in the ear), hypersensitivity to sound and
distorted hearing. Individual susceptibility to noise-induced hearing loss and other potential hearing
problems varies.
The amount of sound produced by a portable audio device varies depending on the nature of the
sound, the device, the device settings and the headphones. You should follow some commonsense
recommendations when using any portable audio device:
• Set the volume in a quiet environment and select the lowest volume at which you can hear
adequately.
• When using headphones, turn the volume down if you cannot hear the people speaking near you
or if the person sitting next to you can hear what you are listening to.
• Do not turn the volume up to block out noisy surroundings. If you choose to listen to your
portable device in a noisy environment, use noise-cancelling headphones to block out background
environmental noise.
• Limit the amount of time you listen. As the volume increases, less time is required before your
hearing could be affected.
• Avoid using headphones after exposure to extremely loud noises, such as concerts, that might
cause temporary hearing loss. Temporary hearing loss might cause unsafe volumes to sound
normal.
• Do not listen at any volume that causes you discomfort. If you experience ringing in your ears,
hear muffled speech or experience any temporary hearing difficulty after listening to your portable
audio device, discontinue use and consult your doctor.
YOU CAN OBTAIN ADDITIONAL INFORMATION ON THIS
SUBJECT FROM THE FOLLOWING SOURCES:
AMERICA ACADEMY OF AUDIOLOGY
11730 Plaza American Drive, Suite 300
Reston, VA 20190
Voice: 800-AAA-2336
Email: [email protected]
Internet: http://www.audiology.org
Содержание 768
Страница 1: ...768 UserManual...
