SAR is an important indicator of the harm of phones

Hello, dear readers! I’ll ask you one question now... Just don’t rush to answer it. Think...

What is SAR?

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

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

The indicator of the parabolic time/price system is terrible, how difficult it is...

The code for the public airport in Sparta, Illinois, USA - who would have thought...

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

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

SAR is the Specific Absorption Rate. This indicator determines (attention!) the magnitude of the HARMFUL IMPACT OF A MOBILE PHONE on a person.

SAR is an important indicator!

This means that the indicator is important. And it will also be useful to know him.

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

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

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

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

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

1) The subjects were exposed to a cell phone for 30 minutes. During this time, their intelligence increased. The time required to complete agility tasks was reduced due to improved 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 discovered that blood pressure increases while talking on the phone.

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

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

SAR – how does it affect our health?

The SAR value for a phone is determined by the level of electromagnetic radiation (measured in Watts) per 1 kg of 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. The rule applies here: THE BETTER THE COMMUNICATION QUALITY AT THE POINT OF LOCATION OF THE SUBSCRIBER, THE LOWER THE RADIATION POWER.

This leads to simple tips to reduce the impact of radiation on you and me.

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

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

3) If you are in an area of ​​poor reception, 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 hold the phone to your ear immediately after dialing a number. Wait for the connection to be established.

What is the SAR level?

Among the characteristics of the phone you can often see the category “SAR level”. Many people do not know what this means, although for others this parameter means a lot.

During operation, a mobile phone inevitably creates a weak electromagnetic field around itself - it receives and sends a radio signal at a certain frequency. The electromagnetic field affects the human body, but this influence has not yet been fully studied - which is why there are many rumors and speculations associated with it.

The most obvious effect is the energy that is released in human tissue under the influence of electromagnetic radiation. That is, they heat up slightly. In particular, a similar principle is used in a microwave oven, but there is no need to confuse a microwave oven and a mobile phone. They are designed differently, operate at different frequencies and are intended for different purposes. The power of any stove is hundreds of times greater than the power of any mobile phone, finally.

What is the SAR level? In strict language, this is the amount of energy released by human tissue at the maximum signal level and, accordingly, radiation from a mobile phone in one second. This level is specially measured in the laboratories of large mobile phone manufacturers so that the devices are approved for sale. There are websites where you can check the SAR level of any mobile phone. Many manufacturers include it in the technical documentation. The permissible SAR values ​​in Europe and the USA are very low, such radiation is safe even for a child. This permissible value was specifically set with this in mind.

Much more worrying may be caused by various unexplored aspects of electromagnetic radiation, which may act detrimentally over time, that is, it is a hidden source of some diseases and ailments that will only appear over time. Unfortunately, research on this topic has so far did not give reliable results. That is, there seems to be a danger, but no one has yet been able to “catch” it or understand its nature. In this case, a simple logic applies - if the effect on the body is constant and intense enough, then it will have some consequences.

So, we can conclude: The electromagnetic field of a branded mobile phone is not dangerous to the human body with moderate use of the device.

If you have to so many talk on a mobile phone ( 2-3 or more hours a day), then the negative impact can be minimized by following these tips:

• Buy a device with a low SAR level (Philips X501, Samsung GT-I8000, Nokia 6600i Slide, Samsung GT-S3100, Sony Ericsson W760i, LG GW620, Alcatel One Touch 806);
• The highest level of radiation is recorded at the moment the connection is established, so after dialing the number, do not rush to put the phone to your ear, wait a few seconds;
• Buy a wired or Bluetooth headset;
• If you are in an area of ​​uncertain or relatively weak reception (less than half the scale on the phone), you should reduce the duration of calls to a minimum and, if possible, replace voice communication with SMS;
• If you often make calls from your car, install a remote car antenna. The metal body of a passenger car significantly worsens the conditions for signal transmission from the phone to the base station, so the power increases.

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

conclusions

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

Therefore, there is no universal guide to a “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 Chinese company's phones are not included in the safe list.

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

All of these are already outdated models, which from the point of view of software updates, 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 didn’t find your mobile phone in the list (it doesn’t matter whether you have Xiaomi or not), but want to know what its radiation level is, write the model in the comments.

Today, everyone uses mobile phones, from young children to their grandmothers. But few people think about the possible harm of a regular mobile phone.

During operation, a mobile phone inevitably emits an electromagnetic field. The impact of such an electromagnetic field on the human body has been almost not studied. But one thing is clear - there is little good in this. Therefore, whenever possible, it is necessary to minimize the impact of a mobile phone on your body.

To determine the level of exposure to an electromagnetic field on the human body, the so-called SAR (Specific Absorption Rates) or specific absorption rate is used. The SAR indicator determines the electromagnetic field energy released inside the human body in one second. SAR is measured in watts per kilogram. The higher the SAR level, the greater the danger the device poses to humans. According to European laws, the permissible SAR level is 2.0 W/kg. In the USA the laws are even stricter. Here, in order for a mobile phone to pass certification, its SAR level must not exceed 1.6 W/kg.

How to find out the SAR level?

You can find out the SAR value in the technical specifications of your mobile phone. If the information you need is not there, you can search on the Internet. For example, on the website or. Here you can find information about the SAR level for all popular mobile phone models.

For example, for mobile phones and tablet computers from Apple, the SAR level is indicated in the table below (information from sardatabase.com):

How to reduce the impact of electromagnetic fields on the body?

Knowing the SAR level of your cell phone is good. But this does not mean that you have to put up with its radiation. Let's look at a number of simple steps that will allow you to significantly reduce the negative impact of your phone on the body.

In the picture: The impact of a mobile phone on a person

The SAR level is measured at maximum transmitter power. In actual use, the level of exposure will depend on the specific conditions. As a rule, the better the quality of communication at the point where the mobile phone user is located, the less power the phone uses.

Based on this, we can give the following advice:

• When holding the phone near your ear, try not to block the antenna. In most modern phones, the antenna is located at the top of the case. Therefore, you should hold the phone by its bottom.
• When talking indoors, if possible, approach the window. This will improve communication with the base station and reduce the phone's radiation.
• If you are far from the base station and the connection with the tower is very weak, then try to minimize the talk time. Because in such a situation, the mobile phone will work at full capacity.
• Make as few calls as possible from cars and other vehicles. The metal body of a vehicle significantly impairs communications.
• Use a wired headset or speakerphone to increase the distance of the mobile phone from your head.

In addition, you need to remember that at the time of connection, the mobile phone emits a more powerful signal than during a conversation. To avoid this excess radiation, when making an outgoing call, bring the phone to your ear only after connecting with the subscriber.