Essentials of Environmental Health (Essential Public Health) by Robert H. Friis

Author:Robert H. Friis [Friis, Robert H.]
Language: eng
Format: epub
Publisher: Jones & Bartlett Learning
Published: 2011-01-07T06:00:00+00:00

TABLE 8-6 Examples of Frequencies in the Radio Range

Radiofrequency Radiation Frequencies

Am radio 0.5 to 1.5 MHz

Amateur radio 3 to 30 MHz

FM, VHF-TV 50 to 150 MHz

UHF-TV 300 to 3,000 MHz

Microwave ovens 2,450 MHz

Radar, microwave communication 3,000 to 300,000 MHz or 3 to 300 GHz

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Source: Data are from PA Valberg. Radio frequency radiation (RFR): the nature of exposure and carcinogenic potential. Cancer Causes Control. 1997;8:324.

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Cell Phones

The cell phone is a very low-power apparatus that transmits in the radiofrequency range of 900 to 1,800 MHz. As of 2000, there were an estimated 92 million and 500 million cellular telephones in use in the United States and worldwide, respectively.47 These numbers have risen dramatically: As of 2009, there were approximately 270 million subscribers (more than 85 percent of the population) in the United States.48 During the same year, there were approximately 4.1 billion wireless telephone subscriptions worldwide.49 The widespread popularity of cell phones means that even small adverse health effects could have substantial implications for population health.50 Cell phone antenna banks are themselves a source of RF radiation. (See Figure 8-9.)

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