The use of DECT (Digital Enhanced cordless Telecommunication) cordless phones has been a major health and environmental concern in Europe and especially in Germany for years. The biological concern arose from studies on HF (high frequency) sources such as GSM cellular phones and towers. Digital cordless phones are also available in the USA – marketed as 2.4 GHz digital technology. A digital cordless phone was placed in a representative private home in California and HF measurements were conducted at different locations inside, using frequency selective spectrum analysis to obtain the cordless phone power densities.
The results showed that the radiation patterns and levels emitted by the small cordless phone base station are almost identical to the DECT technology – also digitally pulsed and permanent microwave radiation.
The power density values presented for each room inside the home can be compared to average DECT cordless phone radiation exposures found in German homes.
The maximum power density was found to be over 500,000 μW/m2 at a normally encountered distance (about 1 – 2 feet) if the base station is placed on an office desk or bedside table. The radiation peak values in the same room are higher than those encountered in proximity to cellular base stations located near residential buildings.
Santa Clara, California
New Orleans, Louisiana
Indianapolis Indiana USA
City of Lithgow, Australia
Elizabeth, New Jersey
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