06-03-2008, 06:14 PM
[quote SDGuy][quote NewtonMP2100]. . .wouldn't hurt to use an earpiece just in case. . .
But - should it be a Bluetooth earpiece?
"Bluetooth uses the microwave radio frequency spectrum in the 2.4 GHz to 2.4835 GHz range. Maximum power output from a Bluetooth radio is 100 mW, 2.5 mW, and 1 mW for Class 1, Class 2, and Class 3 devices respectively, which puts Class 1 at roughly the same level as mobile phones, and the other two classes much lower." http://en.wikipedia.org/wiki/Bluetooth
That is improperly stated and misleading!
A Class 3 Bluetooth device radiates at a maximum power of 1 mW. A cell phone has a radiated power of up to 3.6 W--3,600 times greater than a Class 1 Bluetooth device. All Bluetooth headsets are 1 mW (Class 3) devices.
BTW, your cell phone power output will rarely be as low as 100 mW--reception conditions would have to be ideal.
Class 3 - 1 mW (0dBm) with a 'typical range' of 10m
Class 2 - 2.5 mW (4dBm) with a 'typical range' of 20m
Class 1 - 100 mW (20dBm) with a 'typical range' of 100m
http://en.wikipedia.org/wiki/Mobile_phon...and_health
"The radio waves emitted by a GSM handset, can have a peak power of 2 watts, and a US analogue phone had a maximum transmit power of 3.6 watts. Other digital mobile technologies, such as CDMA and TDMA, use lower output power, typically below 1 watt"
http://news.bbc.co.uk/1/hi/technology/6676129.stm
"The Health Protection Agency has said that sitting in a wi-fi hotspot for a year results in receiving the same dose of radio waves as making a 20-minute mobile phone call."
Additional information:
http://en.wikipedia.org/wiki/Wireless_el...and_health
http://hypertextbook.com/facts/2006/EbruBek.shtml
But - should it be a Bluetooth earpiece?
"Bluetooth uses the microwave radio frequency spectrum in the 2.4 GHz to 2.4835 GHz range. Maximum power output from a Bluetooth radio is 100 mW, 2.5 mW, and 1 mW for Class 1, Class 2, and Class 3 devices respectively, which puts Class 1 at roughly the same level as mobile phones, and the other two classes much lower." http://en.wikipedia.org/wiki/Bluetooth
That is improperly stated and misleading!
A Class 3 Bluetooth device radiates at a maximum power of 1 mW. A cell phone has a radiated power of up to 3.6 W--3,600 times greater than a Class 1 Bluetooth device. All Bluetooth headsets are 1 mW (Class 3) devices.
BTW, your cell phone power output will rarely be as low as 100 mW--reception conditions would have to be ideal.
Class 3 - 1 mW (0dBm) with a 'typical range' of 10m
Class 2 - 2.5 mW (4dBm) with a 'typical range' of 20m
Class 1 - 100 mW (20dBm) with a 'typical range' of 100m
http://en.wikipedia.org/wiki/Mobile_phon...and_health
"The radio waves emitted by a GSM handset, can have a peak power of 2 watts, and a US analogue phone had a maximum transmit power of 3.6 watts. Other digital mobile technologies, such as CDMA and TDMA, use lower output power, typically below 1 watt"
http://news.bbc.co.uk/1/hi/technology/6676129.stm
"The Health Protection Agency has said that sitting in a wi-fi hotspot for a year results in receiving the same dose of radio waves as making a 20-minute mobile phone call."
Additional information:
http://en.wikipedia.org/wiki/Wireless_el...and_health
http://hypertextbook.com/facts/2006/EbruBek.shtml