The technology news site CNET has compiled two interesting lists showing which cellphones give off the most and the least radiation.
In publishing the information, CNET editors note the data aren’t meant to imply that cellphone radiation poses a risk, nor is it meant to say that the phones are safe. As I recently reported in my Well column last week, the data on cellphone safety is mixed, although a few recent international studies have suggested a link with three types of brain tumors. The Food and Drug Administration also says there’s not enough information to determine conclusively whether cellphones are safe or unsafe.
The charts focus on the specific absorption rate, or SAR, of a cellphone, which is a way of measuring the quantity of radio frequency energy that is absorbed by the body, according to CNET.
For a phone to pass F.C.C. certification, that phone’s maximum SAR level must be less than 1.6 W/kg (watts per kilogram). In Europe, the level is capped at 2 W/kg, while Canada allows a maximum of 1.6 W/kg. The SAR level listed in our charts represents the highest SAR level with the phone next to the ear as tested by the F.C.C. Keep in mind that it is possible for the SAR level to vary between different transmission bands and that different testing bodies can obtain different results. Also, it’s possible for results to vary between different editions of the same phone (such as a handset that’s offered by multiple carriers).
Four Motorola phones top the list, with the V195s putting out the maximum 1.6 W/kg. The popular BlackBerry Curve 8330 rounds out the No. 5 spot. To see the full top 10 list, click here.
The list of lowest-radiation cellphones includes the LG KG800 and the Motorola Razr V3x, which put out 0.135 W/kg and 0.14 W/kg, respectively. To see all the lowest radiation phones, click here.
If you don’t see your phone on the list, the site includes lists of cellphones by brand name. My iPhone was listed under “other” brands, but I was interested to learn that its SAR number is 0.974.
译文:
你的手机释放多少辐射？
技术信息网站CNET编制了两个有趣的列表，列出了哪些手机释放最多辐射和最少辐射。
在公布这个信息时，CNET的编辑指出这些数据不旨在暗示手机辐射会造成危险，也不是为了说明手机是安全的。就像上星期我在Well column上所报告的，对于手机安全性的数据有好有坏，虽然近来国际研究报告显示手机安全性与三种类型的脑瘤有关系。食品与药品管理局也指出没有足够的信息确切证明手机是否安全。
据CNET，图表把焦点对准了手机的特定吸收率，即比吸收率（SAR），这是一种计算每单位吸收射频能量多少的方法。
对于一部通过美国联邦通信委员会认证的手机而言，手机的最大SAR水平必须低于1.6W/kg（瓦/千克）。在欧洲，这个水平被控制在2W/kg，而在加拿大最大值为1.6W/kg。列在表内的SAR水平显示经美国联邦通信委员会测试的靠近耳朵手机的最高SAR水平。记住一点，SAR水平有可能随着传送波段的不同和测试个体的不同而产生不同的结果。结果也可能随着同种手机的不同版本而得到不同结果（比如由很多不同承运商提供的电话听筒）。
四款摩托罗拉手机名列榜首前四，其中V195s释放最多辐射达1.6W/kg。黑莓Curve 8330名列第五。查看完整的top10排名，请点击此处。
最低辐射手机的列表包括LG KG800和摩托罗拉Razr V3x，分别的比吸收率为0.135W/kg和0.14W/kg。查看完整的最低辐射率手机，请点击此处。
如果你未能在榜单上看到你的手机，该网站有按照品牌名称列的手机排行。虽然我的iPhone手机排名比其他品牌低，但也很兴趣得知它的SAR水平是0.974。