SAR is an important indicator of harm to phones

Hello dear readers! Let me ask you one question now ... Just do not rush to answer it. Think ...

What is SAR?

Well, what are the answers? There may be several of them:

The monetary unit of Saudi Arabia is the Saudi riyal (abbreviated SAR).

Parabolic time / price indicator - horror how difficult ...

Public airport code in Sparta, Illinois, USA - who would have thought ...

What nonsense! - you say, - How does this all relate to the theme of the site?

Okay, I won't torture you. I'll tell you the correct answer!

SAR stands for Specific Absorption Rate. This indicator determines (attention!) The magnitude of the HARMFUL IMPACT OF THE MOBILE PHONE on a person.

SAR is an important indicator!

This means that the indicator is important. And knowing him will also be useful.

It will be useful to first read the articles about radiation from the phone and the harm of the phone.

As we know, the phone has a signal receiver and transmitter (articles on the sensitivity of the phone and the power of the transmitter). They are the sources of electromagnetic radiation. International organizations have established maximum permissible values sAR level... This value is measured in W / kg.

In the USA the limit is 1.6 W / kg, in Europe it is 2 W / kg. As you can see, there is no unity here. In Great Britain this value is generally 10 W / kg. But this does not mean that if you come to the UK the phone will become less harmful for you. In all this confusion with the maximum permissible SAR numbers, only one thing is clear - the less the better.

In Russia, studies on the effects of a mobile phone on the human body were not carried out until 1997. Only later in the course of research was it established that the electromagnetic field of mobile phones has some effect on the brain.

In different countries, in different years, all kinds of studies have been carried out on the effect of cell phones on humans. Here are some of the results:

1) The subjects were exposed to a cell phone for 30 minutes. During this time, their intelligence increased. The time to complete the tasks on quick wits was reduced due to the improvement of blood circulation in the brain caused by slight heating.

2) Canadian scientists have found that mobile phones cannot cause serious health complications.

3) Their German colleagues found that the pressure rises during the phone call.

4) Mobile phones interfere with pacemakers. More than a million people live with them in the world.

One conclusion suggests itself: scientists around the world cannot come to a consensus about the dangers of mobile phones. Hence such differences in determining the safe level of SAR. I repeat, LESS IS BETTER! You certainly can't argue with that.

How does SAR affect our health?

The SAR value for a phone is determined by the level of electromagnetic radiation (measured in watts) per kg of the brain. Moreover, this value is determined for a mobile phone at maximum power. In reality, the radiation power depends on a number of parameters, one of which is the quality of communication. Here the rule applies: THE BETTER THE QUALITY OF COMMUNICATION AT THE POINT OF LOCATION OF THE SUBSCRIBER - THE LESS THE POWER OF RADIATION.

Hence follows simple tipsallowing to reduce the impact of radiation on you and me.

1) When talking, do not cover the antenna with your hand.

2) When you are indoors, try to approach the window where the connection is better.

3) If you are in a weak reception area, then do not talk on the phone for a long time.

4) At the moment of receiving / calling, the phone radiates to the maximum. Therefore, do not bring the phone to your ear immediately after dialing a number. Wait until the connection is established.

A detailed study of the impact they have on us cell Phones... Health risks, growing public distrust of large producers and the role of science in the flaring conflict.

Scientific research constantly reveals new threats to our lives.

Cell phones - a symbol of constant communication threaten human health. While humanity awaits a verdict from science, scientists face difficult tasks. When radio waves come into contact with living organisms, the line between such different sciences as physics and biology is blurred.

Is the radiation used in telecommunications so susceptible to human cells? How can they affect such a well balanced car? So what did the researchers find that got the press so excited?

At a time when society expects an accurate assessment of health risks, researchers conduct their research.

Year of issue : 2009
A country: France
Genre: Documentary
Duration : 00:52:26
Transfer: Professional (two-voice), studio "Lexicon"

The film involves : Andrew Marino (Doctor, USA), Joe Viart (Communications Engineer, France), Alain Vian (Biologist, France), Oli Johansson (Professor of Neurosurgery, Sweden), Frans Adkofer (REFLEX Program Coordinator, Germany), Isabel Lagrou (Biologist , France), Bernard Veeret (physicist, France), Leif Salford (neurosurgeon, Sweden), Roni Seeger (biologist, Israel), Lenard Hardel (oncologist, Sweden).

SAR for popular devices 2014

According to the data obtained, we can say that the safest for influencing the head was the iPhone 3G, which at the same time - and the highest impact on the body. The most dangerous can be considered the iPhone 5, which has the highest SAR on the head, simultaneously with a fairly high level of SAR on the body.

These results suggest that iPhone SAR has remained at a fairly high level since 2010, which is not a good indicator, especially when compared with competitors.

Today it's safe to say that new iPhones 6 and iPhone 6 Plus are some of the most harmful phones to health in terms of specific absorption rate (SAR).

To obtain permission to sell electrical equipment, companies must obtain several certificates that confirm their harmlessness in the materials of the housing and internal parts, the support of the minimum acceptable frequency range and some other approvals, one of which is the SAR level.

Different countries have different standards and requirements with acceptable values. For example, in the United States, the maximum SAR value for mobile phones is 1.6 W / kg. This requirement is explained scientific research, which showed that harmful effects begin at exposure levels from 2 W / kg - with prolonged exposure to such a dose on the human body, the temperature rises by 0.3 degrees Celsius, and minor changes in proteins are also recorded. At level less than 1 W / kg scientists failed to record any effect on the body.

The iPhone 6 (A1586) and iPhone 6 Plus (A1524) have SAR levels at 1.18 and 1.19 W / kg, the same for the head and body, respectively. Thus, experts strongly recommend avoiding direct prolonged contact with the device and trying to keep it at a distance of 5 mm from the skin surface. For example, you can carry your smartphone in a case, then the bulging camera will not bother you, and the smartphone will remain intact.

According to measurement data SAR, we can say that the most harmless smartphone - Motorola MPx200, which was released in 2003, has a SAR value of 0.120 W / kg per head. And the lowest SAR value among the iPhone was marked by 3G - 0.52 W / kg per head. If we talk about more relevant devices - LG G3 (D855), Samsung GALAXY Note 4 (N910C), Sony Xperia Z3, Samsung Galaxy Alpha (G850-F), Nokia Lumia 930 and Htc one (M8) - the SAR level in them is presented on the chart:

In order to protect yourself from excess radiation, you do not need to put your smartphone in bed while you sleep, try to carry it not in your pocket, but in your bag, and pay more attention to other areas of life, where exposure to the body can cause irreparable harm in a short time - food, behavior on the road, bad habits and lack of adequate sleep.

Download

Users, finding the line "SAR level" in the specifications of a smartphone, as a rule, do not pay attention to the value written in it. And in vain - the damage that the gadget can cause to the user's health depends on how large it is. What is considered normal SAR level for mobile phones and what is excessive, we will tell in this material.

SAR is an abbreviation for Specific Absorption Rate, which is energy absorption rate. The SAR level shows how much energy of the electromagnetic field is absorbed by the tissues of the human body in 1 second. The unit for measuring the radiation from SAR phones is W / kg. Accordingly, looking at the level, the user can immediately decide how likely it is that the gadget will harm him.

The SAR value is not constant. At any given moment, the level of radiation depends on many factors - primarily on the quality of communication. If the connection is good, then little energy is released. The worse the connection, the more negative attitude the smartphone has on the body. The maximum is reached when the gadget switches from one tower to another. Exactly maximum value and must be indicated by manufacturers in the specifications.

It is worth noting that experts have not yet determined exactly whether mobile devices affect the human body in general. But the uncertainty in this case is even worse - therefore, doctors scare active users with the death of cells and the formation of cancerous tumors. You can find out what symptoms occur during radiation from this table:

How much energy does the devices emit?

The first devices for communication of the NMT standard were characterized by a SAR level of 5 watts. If experts now discovered such a device, they would grab their heads in horror and write wherever possible that such a device should not be put on sale. The high emissions were due to the minimum number of base stations.

Later, the requirements for this parameter became more and more stricter - the radiation power of GSM devices did not exceed 1 W. The widespread belief that old phones with buttons were more harmful than modern advanced devices is actually mistaken - laboratory research showed that the radiation level of featurephones ranged from 0.42 to 1.12 W / kg. This is the norm by today's standards.

The SAR limit is not unified - each geographic area has its own opinion on this:

• In the USA, it is considered normal if the ATS does not exceed 1.6 W / kg per gram of tissue.
• In Europe, a slightly different way of calculating - there CAP is calculated per 10 grams of fabric. The maximum allowable value is 2 W / kg.

In Russia, the method for measuring radiation is completely different - SaNPiN prefers to determine it in W / cm2. Of course, manufacturers of "mobile phones" are in no hurry to publish information about radiation in the units of SaNPiN. The SAR level in W / kg cannot be converted into these units either. It remains to take the word of the Russian government agencies, which claim that the SaNPiN methodology is even tougher than that used in the USA and Europe.

How to find out the SAR level?

The SAR level must be recorded in the technical specifications of the mobile device - that is, in the small booklet that is included in the package. If this information is not there, you can go online and google it. It is worth going to the site "" and looking for the SAR value in the list of characteristics of a particular device.

The fallback is the devicespecifications.com portal. In the cards of many smartphones on this site there is a tab “ SAR».

By clicking on the tab, you can find out the radiation level of the smartphone in 2 versions (for the head and for the body), and also see how harmful a gadget of a particular model is in comparison with other models of the same brand and other brands.

Which phones are the safest in terms of SAR?

According to the results of a fan study conducted jointly by Roskachestvo and the international organization ICRT, the most harmless smartphones... The A3 and A5 gadgets were included in the top five safest in terms of radiation, and the Galaxy S7 Edge was recognized as the best in terms of a combination of many safety and quality parameters. The radiation level of the latter is only 0.264 W / kg.

But Apple has nothing to brag about. The devices of this company are considered very harmful. Only 3G differs in a satisfactory level of CAP, which many do not even remember.

Most iPhone models emits 5-6 times more energy than Samsung Galaxy Edge 7 (with Exynos processor).

The company has also done a good job of securing its devices. The popular models Mi5, Redmi 4 and Mi MIX have CAP levels in the range from 0.35 to 0.4 W / kg. The listed phones with low SAR levels will definitely not harm their owners.

How to reduce the negative impact of the phone on the body?

To reduce the negative impact of a mobile device on the body, you should heed the following recommendations of experts:

• Bring the smartphone to your head only after the call is established. The most intense radiation occurs during the connection.
• Call from the metro, trams, trolleybuses, cars only when absolutely necessary. When making calls from transport, the signal will not be ideal (metal interferes with it), which means that the radiation will be higher.
• When talking, go to the window or get out onto the balcony so that communication is better.
• Do not cover the antenna with your finger during a telephone conversation.

Best option for those looking to avoid radiation exposure quite - purchase. Then you can talk as much as you like and anywhere, without worrying about your health.

Conclusion

No matter what doctors say, there is no serious reason to worry that a smartphone is capable of irradiating the owner and provoking the appearance of any disease. Even the iPhone 7 Plus, which has a "minus sign" of significant SAR, can be safe - because the number present in the specifications is the maximum number, not the average. However, you should not ignore security measures - there is no doubt that the radiation of a smartphone has a certain effect on the tissues of the human body.

Camera, battery, processor - these are all very important criteria when choosing a new gadget. However, it is worth paying attention to the safety of the device, having learned smartphone radiation level... This will help you understand which smartphone is safer and which one with a high score. SAR.

conclusions

To obtain the German environmental certification "Der Blaue Engel" (translated from German "Blue Angel"), the specific absorption capacity of the phone must be less than 0.60 watts per kilogram. All presented smartphones in the SAR rating more than double this figure.

Therefore, there is no universal guide to the "safe" level of phone radiation yet, as there are different safety standards.

Which phones are safe then?

There are no Xiaomi models in the latest infographic. This does not mean that the phones of the Chinese company are not included in the list of safe ones.

In a previous article, less than 0.60 watts per kilogram was shown by: Mi 5, Mi 5S, Redmi 3 Pro, Redmi 3S Prime and Redmi Note 3 Pro.

All these are already outdated models, which in terms of updating software the company will not support in 2019. Therefore, for the relevance of the information, we will analyze the latter in a separate review.

Dear readers, if you have not found your mobile phone in the list (it doesn't matter if you have Xiaomi or not), but if you want to know what its radiation level is, write the model in the comments.