Not many people know what it is SAR level in mobile devices. Today we decided to discuss this issue. The SAR level is a special indicator that can characterize the largest amount of electromagnetic radiation for various models and brands of mobile phones.

Dispute

If you have previously encountered information about how a mobile phone can influence the human body, then this article will be able to supplement your knowledge, and those people who have never seen the relevant data will be able to learn a lot of new things for themselves. For example, the SAR level of Philips may differ significantly in its characteristics from other mobile phones. It will be interesting to learn about how the communicator is able to influence the human body. Of course, there are currently a large number of different debates on this issue. Some experts are looking for every clue to prove that radiation from devices can cause great harm to people. On the other hand, scientists convince us that the dangerous indicator in mobile devices cannot exceed certain standards, and accordingly, communicators are completely harmless. Surely now many of you are wondering how the SAR level can affect the body, as well as how to determine mobile device, which produces the most radiation.

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In fact, there is no definite answer, or rather, no one knows exactly how these waves can influence the human body. The SAR level of mobile phones is a certain part of the absorption coefficient of electromagnetic radiation by the human body.

This data can be measured in watts per kilogram.

Acceptable standards

Surely you know that almost all mobile phones that are currently sold in showrooms undergo special certification, and this procedure can be completed successfully only if the SAR level does not exceed established standards. There are special regulatory bodies that test and measure these parameters, in most countries the SAR standard is 1.6 watts per kilogram. This refers to the unit of human mass. For example, the SAR level of Nokia is indicated separately for each model. The same can be said about a large number of other popular mobile device manufacturers. The value is characterized directly by the electromagnetic radiation of the device itself at maximum power. Judging by practice, then we can confidently note that the level of this indicator is significantly lower than critical, but at the same time, an increase in these parameters may depend on various factors, such as the presence of a signal.

How to reduce the negative influence of a communicator

Surely many people want to learn about the basic rules that can reduce the impact of mobile device radiation on the human body. Now we will give you several such rules, and if you wish, you can use them. The SAR level can actually negatively affect the human body, but with the help of special rules you can move away from such radiation, of course, this cannot be done 100% of the time.

The first rule is that you should keep your mobile device as far away from your body as possible, especially around vital organs such as your heart. During telephone conversations It is recommended to use a special headset more often or simply turn on the speakerphone, while the communicator itself must be kept as far away from you as possible. If you are in an area where the signal from your mobile device is poor, it is wise to avoid long conversations, as in such cases the radiation can even increase several times. It is recommended to bring the mobile phone to your ear only after there is a complete connection with the called subscriber, since when dialing the phone begins to operate at maximum power level.

Closed space

When choosing a mobile phone, we pay attention to the range of different technical characteristics, but, for some reason, no one looks at such a value as SAR. Moreover, almost no one knows what it is.

For mobile phones, SAR is a measure of electromagnetic radiation affecting the human body. Literally, the abbreviation SAR stands for: Specific Absorption Rates. SAR is measured by the ratio W/kg (watts per kilogram) and is used to measure exposure to electromagnetic radiation mobile phone on the human body. In Europe, the acceptable value is 2 W/kg for 10 grams of human tissue (no more). The lower this figure, the better.

Recently, shortly after the release new iPhones 6 and iPhone 6 Plus, there was a lot of discussion on the Internet about a statement that Eldar Murtazin, an analyst at Mobile Research Group, made on Twitter. He writes about the new iPhone 6: “Emits three times more than its counterparts, and even more than the unknown Chinese.” Also: “using the new iPhone without a headset can simply be unsafe.”

But the SAR value itself iPhone phones 6: 0.99 W/kg at the head, 0.91 W/kg at the body. Eldar Murtazin explains this simply: the bend of the radio module is at its limit in order to break through the aluminum body of the phone.

Of course, this does not prove that using this phone is dangerous for you, but still, for such a well-known and beloved brand by many, it’s not good. I would not recommend this phone to a child.

The situation is noticeably better Samsung. After a short search for phones with minimal SAR levels, it turned out that this list is dominated by Samsung phones Galaxy. The table of telephones of different brands is given below. Here are not all the phones, but only those that I managed to find and those that are on sale as of 2014.

How to find out the SAR level of a phone?

Sometimes this information is available on the company's official website, in technical specifications phone. Also often listed in the user manual. An online store can also indicate the SAR value on the product page (although this rarely happens). In any case, if you want to find out the SAR of any mobile phone model, Google or Yandex can help!

In standby mode, the phone emits almost no electromagnetic waves, only occasionally, for a fraction of a second, to communicate with the base station. So there is no need to be afraid to carry your mobile phone in your pocket. But a continuous bend occurs during data transmission or conversation.

And finally, two simple tips for those who like to talk on a mobile phone for hours:

1. Do not press the phone to your ear and do not hold it to one ear all the time (move it to the other ear every ten minutes).

2. Use a headset.

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 to humans. this device. 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. Consider the series simple actions, which 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, than better quality 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. Metal body vehicle significantly degrades communication.
• 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.

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 influenced cell phone within 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 implies simple tips, allowing us 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.

We are talking about a coefficient that worries many users.

SAR (Specific Absorption Rate) is an indicator that characterizes the degree of negative impact of a phone or smartphone on the user. In other words, this is the specific absorption coefficient of electromagnetic radiation by the human body. The unit of SAR is watts per kilogram (W/kg).

The indicator was introduced in 2001 and was developed by gadget manufacturers. The purpose of creating SARs is to demonstrate that phones are harmless to their users.

SAR values ​​in different countries

Depending on the state requirements for the safety of gadgets, the SAR value in different countries may vary. For example, for the USA the permissible level of radiation is up to 1.6 W/kg, Europe considers values ​​up to 2 acceptable, and in Russia a standard has been adopted that does not exceed 1.6. It is important that the peak SAR value is regulated at the legislative level.

Devices rarely operate at maximum power, which means that the actual figure may be 10 times less than declared. In order for the phone to operate at the maximum stated SAR values, a minimum network level is required mobile operator. If the smartphone shows less than half the network level, the radiation level increases. In other cases, SAR is within the normal range for humans.

SAR level in different periods

The minimum SAR is 0.1 W/kg, but such figures are difficult to find in modern gadgets. The maximum value is about 10 W/kg, which is also very rare.

Manufacturers today strive to minimize the impact of their products on users, so they are working to reduce the SAR indicator. The greatest influence on this parameter is the degree of distance from the ear to the smartphone antenna. Thanks to massive cases, this is not so difficult to implement, but this method also has disadvantages - a decrease in the SAR coefficient leads to a deterioration in communication quality.

The second way to influence this value is through screening. Thanks to metal elements, the harmful effects of electromagnetic waves are absorbed by the device body or special equipment inside the phone. This option does not affect the network signal level and can significantly reduce SAR.