Radiation from cell phones has been getting a lot of press of late but according to theBioInitiative Report当谈到脑瘤和听神经瘤时,无绳电话看起来和手机一样危险。
DECT技术起源于欧洲,并已在世界各地广泛推广。今天,有超过8亿的DECT系统在使用中。(1)DECT技术中使用的电磁辐射的脉冲频率是微波波段,手机也是。
Oversight For Phone Safety Is Lacking
The ICNIRP (International Commission on Non-Ionizing Radiation Protection) is responsible for monitoring and creating guidelines for radiation technologies. The ICNIRP guidelines focus exclusively on high frequency radiation and thermal activity. But many scientists have been pointing out that pulsed microwaves at low frequencies are also cause for alarm. Yet there are no guidelines for non-thermal, low-frequency radiation. Anotherwords, the only tests performed for these technologies are thermal (testing whether the radiation can heat an object and cause harm due to that heating)orfor frequency and height (if the wave length is high and close together radiation causes immediate harm). Gamma waves are high frequency as they are generated by radioactive atoms in nuclear explosions. So, heat and frequency/height are the only two criteria the commission tests for.
Since the commission does not consider whether pulsed low-frequency radiation is harmful or not, industry studies have in the past tried to tell us they are not…
什么是电磁辐射?
Just as a refresher course: — electromagnetic radiation consists of an electrical field plus a magnetic field which each oscillate perpendicular to one another as they travel through space. Amplitude is the height or breath of the wave. As said above, frequency is the waves per specific time frame, usually seconds, from extremely low frequency radiation (ELF) which have longer wavelengths (longer wavelengths are measured in megahertz) up to short gamma rays where the wavelengths are extremely close together. Rays with shorter wavelengths can carry more information and more energy.
As can be seen below, the electromagnetic wavelengths we can see are certainly a very small portion of what is going on out there…
Note how the microwave spectrum blends in with the radio spectrum…
Why Are DECT Phones Dangerous?
DECT (Digital Enhanced Cordless Telecommunication) phones are cause for concern in that the base station is usually kept in a convenient spot close by such as on a bedside table, or on your desk, or in the kitchen. The base stations of all older and most current models continually emit radiation even when not in use. And when a DECT phone is in use, the unit continuously radiates at high power from handset to base station. Even cell phones power down when close by a base station. Cell phones radiate on high when they are furthest away from a tower (fewer signal bars) and this is when you should not be using them, as that is when the radiation is strongest, as cell and tower are struggling to communicate with each other. DECTs are always on high power when in use. See end of article for the one phone I found that does power down.
There are two factors to be aware of in regard to wireless technologies. There is the radiation between handset and base station and then there is the information-carrying radio wave (ICRW). Microwave radiation carries the voice/data information by means of modulations. Scientists are now observing that pulsed information transfer by microwaves triggers biological effects. (2) Even the lowest pulsed frequency might not be safe. Wireless technologies pulse radiation in an organized fashion and these pulses interfere with the various biochemical processes going on in the body. (2) Just as electromagnetic interference from wireless technologies interferes with an airplane’s or a hospital’s equipment — so too with our inner processes. We are electrochemical/electromagnetic creatures, as can be experienced when hooked up to a electroencephalogram (EEG, a test that measures and records the electrical activity of the brain) or an electrocardiogram (EKG or ECG, a test that checks for problems with the electrical activity of the heart).
Studies About Electromagnetic Waves In Phones
Over 1000 medical doctors in Germany have endorsed theFreiburger Appeal, which postulates that people’s exposure to electromagnetic fields (mainly mobile/DECT) — is triggering widespread illness…
Out of great concern for the health of our fellow human beings do we – as established physicians of all fields, especially that of environmental medicine – turn to the medical establishment and those in public health and political domains, as well as to the public. We have observed, in recent years, a dramatic rise in severe and chronic diseases among our patients, especially:
- Learning, concentration, and behavioural disorders (e.g. attention deficit disorder)
- Extreme fluctuations in blood pressure, ever harder to influence with medications
- Heart rhythm disorders
- Heart attacks and strokes among an increasingly younger population
- Brain-degenerative diseases (e.g. Alzheimer’s) and epilepsy
- Cancerous afflictions: leukemia, brain tumors
Moreover, we have observed an ever-increasing occurrence of various disorders, often misdiagnosed in patients as psychosomatic:
- Headaches, migraines
- Chronic exhaustion
- Inner agitation
- Sleeplessness, daytime sleepiness
- Tinnitus
- Susceptibility to infection
- Nervous and connective tissue pains
Since the living environment and lifestyles of our patients are familiar to us, we can see – especially after carefully-directed inquiry – a clear temporal and spatial correlation between the appearance of disease and exposure to pulsed high-frequency microwave radiation (HFMR), such as:
- Installation of a mobile telephone sending station in the near vicinity
- Intensive mobile telephone use
- Installation of a digital cordless (DECT) telephone at home or in the neighborhood
No Consensus On Cell Phone Safety
There are currently many conflicting reportsregarding the dangers of RF (radio frequency) and microwave technologies. The International Agency for Research on Cancer (IARC) recently published theInterphone studywhich looks at mobile phone use and brain cancer risk. The Interphone International Study Group, is made up of 21 scientists, from 13 countries. On the first page of the report it reveals that 5.5 million € of its funding was contributed by industry sources. Of the 5.5 million €, 3.5 million € was contributed by the Mobile Manufacturers’ Forum (MMF) and the Global System for Mobile Communication (GSM) Association. Many feel the project has tarnished the agency’s reputation and scientists within Interphone have come to differing conclusions as to whether cell phones present a cancer risk.(4)
The Environmental Working Group’sCell Phone Radiation Science Reviewis a great place to read: a synopsis of industry and private studies.(5)
Current Radiation Standards Don’t Consider Effects Of Radiation On Children
1996年,美国联邦通信委员会制定了手机辐射标准。该机构根据IEEE(促进技术进步的专业协会)和ICNIRP的建议制定基本标准。这些标准(也被称为SAR,或比吸收率)允许头部的最大暴露量(1.6 W/kg)比身体其他部位(0.08 W/kg)高20倍。这个标准显然没有考虑到儿童的安全,这可以从下面的插图中推断出来。
Children are more susceptible! As can be seen above, children have surprisingly thin skulls. Their nervous system is still developing, their cells are dividing more rapidly, and their immune systems are still undeveloped.** According to a recent study, bone marrow in a child’s skull absorbs 10 times more microwave radiation than does an adult.www.environmentalhealthtrust.org
2010年12月6日发表在《流行病学与社区健康杂志》上的一项研究,其首席研究员Leeka Kheifets是加州大学洛杉矶分校公共卫生学院的流行病学家,他研究了28,745名儿童,其中一半暴露在手机辐射下。研究发现,与没有接触手机的孩子相比,那些在出生前后都接触手机的孩子出现行为问题的可能性要高出50%。孩子在子宫里就接触手机,而不是在出生后接触手机,他们出现边缘性行为问题的风险增加了40%。而那些在母亲怀孕期间没有接触手机,但在7岁前使用手机的母亲,出现行为问题的可能性要高出20%。’*6
For many millenia we have evolved without the constant stream of pulsed low frequency radiation bombarding our cells, without chemical additives settling into our organs, without genetically modified plants as our food source and without antibiotics being forcefed to livestock forever making those antibiotics useless defenders against ever new strains of infectious agents. All the above weaken our defences and leave us vulnerable to extinction!
Which DECT Phones Are Safe?
I thought the Siemens Gigaset was the only safe DECT in the U.S., as they say so on their website:
Siemens Gigasets, tick the ECO DECT option:gigaset.com
But it appears it is not. Here is a response I received from Siemens, March, 2013.
Thank you for posting your question to Gigaset support. Unfortunately, radiation-free feature is not available in the USA but there is a mode of the phone which reduces the radiation by 80 percent when you are not making calls. When there is a call the radiation is normal as on any other phone but when the phone is in idle mode the radiation is reduced. When the handset is off and base station unpluged there is no radiation emition at all.
Should you have any further questions, queries or suggestions please do not hesitate to contact us and we will be more than glad to assist you in any way we could.”
With kind regards,
Technical Support for Gigaset Products
Phone 866 2478758
Web pagehttps://www.gigaset.com/customercare
***
我写信给松下质疑生态模式的含义。Panasonic wrote back that their “IntelligentEco Mode featureautomatically lowers the power consumption when you’re using the handset close to the base unit.” As a cell phone does when you are close to a cell tower. This is a plus — but would be nice if the headset did not radiate 24/7 as well. See explanation on Panasonic site:panasonic.ca
***
I questioned another company asking —
On Amazon you say your DECT … is Eco-Friendly.
What do you mean by that? Does the base shut off when not in use?
And they wrote back saying:
“Amazon actually puts their own product description of what they sell on their website. It would be best to contact Amazon on what they mean when they state this. The only term we use when using ‘Friendly’ is ‘Wifi-Friendly’. What we mean when we say Wifi-Friendly is that the phone should get rare, if at any interference, with a Wifi network.”
Symptoms reported by Students exposed to WiFi in Classrooms
- Headaches
- Dizziness – Nausea – Vertigo (subsides when student leaves the school)
- Visual and Auditory Distortion (unsure of where they are, voices change volume)
- Racing Heart Rate (Tachycardia) Click here for more details
- Memory Loss (trouble remembering school material)
- Attention Deficit (trouble concentrating while in class)
- Skin Rash (goes away on school breaks)
- Hyperactivity/Anxiety (behaviour not previously seen in the child)
- Night Sweats (unexplainable, unrelated to fever)
- Insomnia (microwaves affect melatonin levels)
** A Tale of Two Countries: Wired vs. Wireless Internet in Schools
www.whyfry.org
References:
1. European Telecommunications Standards Institute (ETSI)
www.etsi.org/WebSite/Technologies/DECT.aspx
2. BioInitiative Report
www.next-up.org/pdf/BioInitiativeReportComplete.pdf
3. Freiburger Appeal
www.laleva.cc/environment/freiburger_appeal.html
4. Microwave News
www.microwavenews.com
5. The Environmental Working Group’sCell Phone Radiation Science Review
www.ewg.org/cellphoneradiation/Health-problems
6. Journal of Epidemiology and Community Health
https://jech.bmj.com/content/early/2010/11/11/jech.2010.115402?q=w_jech_ahead_tab
Article discussing above on www.women’shealth.gov *
https://64.94.16.210/news/english/647044.htm
Federal Office of Public Health, Switzerland. Electromagnetic Field Fact Sheet DECT Phones
www.bag.admin.ch
Anonymoussays
See the movie Full Signal
http://www.fullsignalmovie.com
Beesays
Thank you for this! Particularly the list of what phone is safest (that can be purchased in the US). Panasonic’s listing of ‘Eco DECT plus’ is confusing and apparently misleading. Today is May 9, 2012. Is this article here (and the listing of what’s available for sale in the US – namely the Gigaset phone) still the latest info? I need a new phone soon and would like a safe one. Thanks again!
Keirensays
Hi there Bee,
I searched a few months ago and again today… it appears that U.S. consumers are not yet asking for low radiation DECT phones, so phone manufacturers are not supplying them. In Europe – Panasonic, Siemens and Orchid are making low radiation DECT phones, but in the U.S., it appears the only low radiation DECTs available are made by Siemens… if anyone finds any others, please do write! Thanks for writing!
StillSearchingsays
我在美国,寻找一个DECT 6电话,不使用时不辐射。然而,我在亚马逊网站上发现了一篇评论,日期是2012年7月30日:“我买这款手机是因为评论说它在Eco +模式下没有辐射——其他Gigaset手机也是如此。”当我和Gigaset客服通话时,我问过他们。他们说这是真的,但由于该频率会干扰军事行动,因此不能在美国使用,所以在美国没有启用该功能。所以在美国所有的DECT手机都会发出辐射,即使在空闲的时候……”所以我又浏览了Gigaset网站上关于ECO DECT的常见问题解答。美英版本说,有一个“减少传输功率几乎为零当手机停靠(只有一个注册的手机)”。它没有提到ECO Plus。上面写着“只有一部手机”,这说明如果你有两部手机或两部手机以上,那么即使在不使用或不连接的情况下,手机的发射功率(辐射)也会保持正常水平。英国的常见问题解答中特别提到了ECO Mode Plus,并指出:“无辐射的ECO Mode Plus在手机待机时关闭发射电源。”当所有已注册的手机都支持ECO Mode Plus时,关闭DECT发射电源。当使用ECO Mode Plus时,基站只在必要时发送信号,例如,当来电时,当手机在使用时,或当连接发生时。
When not in use, the transmitting power is turned off (this applies to all registered handsets that support ECO Mode Plus). This is true when you are not phoning or changing settings on the base station.’ So I don’t know for sure, but it doesn’t look good for the USA. Still searching.
StillSearchingsays
这是我2012年9月26日帖子的后续。我亲自联系了Gigaset客服。他们写了“生态模式+选项,可以在不使用时减少100%的辐射,这在美国是没有的。”这一功能使用的是非标准频率,已经在军事和飞机上使用,这就是为什么Gigaset无法获得FCC的批准,不得不禁用这一功能。“这证实了我在亚马逊网站上看到的帖子。因此,在美国似乎什么都买不到。
@ Still Searchingsays
Thanks so much for writing in with all your research. Such a shame we cannot get a Low Radiation DECT phone in the States. I have searched as well, with no success. Unfortunate about the Gigaset.
More searchingsays
智能生态模式:松下的最新术语。
Anyone have a clue as to what this really means?
我猜带卫星无绳电话的有线基站是目前最安全的电话,但我找不到任何可以备份的东西。没有任何证据,除了这个智能生态模式——这些词似乎是未经证实的。没有细节。
Barbarasays
What about Smart Meters installed by public utility companies? What risks do these pose?
Celestesays
Hi,
几年来我一直想找一部安全的电话。我的家人现在求我给他们一些无绳电话。我们现在只使用松下的有线电话,我的家人再也不能把这些长电线满地都是了。只是想知道你是否找到了一个你觉得安全的无绳电话?
Thanks for sharing such a well researched post.
Keirensays
I have a letter out to Siemens about this phone though. Gigaset A510 A Quattro 4-Pack DECT6.0 Cordless Phone – Made in Germany
In Europe you have many choices, but here I have yet to find one.
Your best option might be to find an old cordless with an antenna, as these do not have the new DECT technology and do come close to the radiation levels of DECT tech.
Must be so hard worrying about kids and all the dangers society puts in their path.
Celestesays
Keiren,
Thanks for your quick response. After I posted here I watched this video
about how DECT affects heart rate
https://www.centerforsaferwireless.org/Cordless-phones.phpand decided
对一遍。Some are saying it’s hard to confirm that the Eco DECT
plus phones are actually not radiating unless you check them with an
EMF detector. I have one but still it concerns me.
Like you said, so many things to worry about with our children and ourselves, but I think my gang will have to suffer with the corded phones. I’m thinking about an old analog 2.4 ghz cordless phone they could use because some have said they don’t give off radiation, or as much radiation. You can still find some on ebay and a few other places. When you suggested an old cordless with an antenna would that be one of the 2.4 ghz – the old analog phones – would that be a safe option? Conflicting info on the web about just which of the old phones are safe.
再次感谢!
Celeste
Matthias Msays
那么,学校对Wifi的研究有多好呢?
Have they actually measured carbon dioxide levels as well? Carbon dioxide levels in most schools are far too high and these give similar symptoms I would assume.
devisays
You can buy a Siemens A510 Gigaset with 4 handsets at the shopping channel $70 . It has the Eco Dect feature which cuts off 70%. Better than nothing.
Lorisays
hello,
谢谢你提供了一篇内容丰富的文章。
我确信家里不应该有DECT电话,但我很困惑……有线电话也使用DECT技术吗?如果是这样,它们比无线更安全吗?如果我需要为家里购买新手机,使用什么品牌/型号最安全?我住在加拿大。很多谢谢!
Keirensays
Hi Lori,
Yes there are corded/cordless DECT phones…usually sold with a cordless handset. The main phone is corded, all other handsets cordless. You must read the box carefully. But a give away would be if it comes with additional cordless handsets or says it’s expandable. Any corded phone that does not have wireless technology is a safe phone. But prepare to read the information on the box carefully! Good luck!
Yannissays
Hallo,
Does anybody knows if there are any DECT Phone with Corded base AND corded handset ?
OR, two similar corded phones with corded handsets, communicating by DECT ?
那将是最佳组合。
Greetings from Greece,
& Thanks !
Andysays
Gigaset看起来很不错,尤其是如果你看了这个视频,这个人真的测量了Gigaset。让你安心。
He’s a huge nerd thou! But it’s worth it!! Crazy the DECT and WiFi readings in this.
http://www.youtube.com/watch?v=NLkesYPqFXw
Marcsays
I tried the Gigaset; it gave me headaches. So does the Panasonic Dect cordless I just bought. I plan to return it and get a corded phone for home. I feel like a freak cause I’m the only person I talk to that has this reaction to Dect phones: headache and nausea.
Jamessays
HI!
Does anyone have or know of any definitive information regarding the radiation risk of using a corded headset (not HANDSET) on a DECT phone?
多年来,我一直在我的DECT手机上使用有线耳机,认为它更安全。但我最近读到一些信息,上面说手机上的有线耳机甚至比把手机放在头上更危险。再次,我想知道这是否适用于DECT电话上使用的有线耳机。
Keirensays
Since most all U.S. DECT phones emit radiation (amount varies) when idle, it is true your setup might not be the best. I do not know if wired headsets on mobile/DECT phones make them more dangerous, I haven’t heard that from a reliable source.
Georgesays
Fellows, there is no safe DECT phone, because it’s cordless, and is no different to a mobile phone. They both radiate microwave non-ionised radiation. Even an Analogue is and was dangerous, this is why many users in the early days were diagnosed ME and CFS.
If you use a metre when talking on the cordless phone take a reading at the ear you are listening with, then move the metre to the other ear and you will see that the radiation is still high on the other side.
Now this tells you that you have just cooked your brain, and if used for long-termed and prolonged period of time you will suffer neurasthenic symptoms and possible cardiovascular, neurological and haemodynamic disturbances.
Best of health users of DECT and Analogue cordless phones.
Meadoe Nybergsays
I would like to know if my Vtech cordless phone is safe and if it is emitting electromagnetic frequencies when i am not using it?
Chrissays
Yes, Your Vtech Cordless phone BASE is emitting EMF when you are not using it.
All cordless phone bases in North America emit 10 pulses every second, all the time, 24/7, at strong intensities. If you want to know how strong the signal is and how far it goes, go outside with the phone and see how far you get signal.. I’ve measured cordless base signals up to 70-80 feet away from homes. Neighboring homes receive this signal, and your neighbor’s cordless base EMF will surely enter your home.
Ryansays
这写得好极了。非常感谢。我一直在研究这些DECT手机发现网上的内容要么让人困惑,要么有些夸张。这既不是。
Has anything changed? I found the same basic scenario that you painted above. Siemens phone with reduced RF during non-calls, and Panasonic with less RF when close to base, but NOTHING else.
我的问题是我需要给我父母买一部DECT电话。他们需要流动性,但我不想让他们面临这些风险。We also need to get them the call blocking feature (I only see it on one Panasonic DECT phone).
我尝试过其他的解决方案,包括一个独立的呼叫拦截器,但效果很差。这可能与欧洲的电话系统有关(这个被认为是为英国设计的拦截器)。
I’m surprised manufacturers STILL are not taking this stuff seriously. How frustrating.
Chrissays
Nothing changed. Use a cell phone, get rid of DECT, the only solution.
Cell does not emit 10 times a second.
Cell with WiFi or Data on does emit a lot though, so that’s not recommended either, even in standby mode. I would say a cell on standby with WiFi on is almost as bad as having a DECT base, especially if it’s in your pocket and you have apps like Facebook that constantly use the network.
Joel Hodleysays
Does anyone know if the base unit’s power is completely off is there any transmission/pulses to/from the other non base units that have their power on? I assume that if the base unit is off the other units stop transmitting. I was thinking at least at night time to have a timer connected to the base unit that would kill its power during the night to spare at least 8 hours of the day and automatically turn on in the morning.