Car Navigation DVD instrument sound is the main source of radiation?

The car also has a problem of electromagnetic radiation? Some time ago about a car to exceed the standard of electromagnetic radiation information, allowing the owners to everyone.Although the final results showed that it was a false alarm, but it makes people realize that, after the car formaldehyde pollution, we will begin accepting another more subtle but also more dangerous enemies inside the electromagnetic radiation pollution.In fact, it may be the result of improper Refitting Vehicle radiation rising important reason.Therefore, the majority of Owners Beware of the car "stealth killer", more want from inside the car modification etc..

Car Navigation DVD instrument sound is the main source of radiation?

On the public environmental electromagnetic radiation limit, since the 90's of last century, our country has adopted the International Radiation Protection Association recommended limits 0.1mT (millitesla).In sharp contrast to other countries is more and more strict standard National Radiation Protection Committee official website the risk values set in the 0.4T (micro Russ), internationally recognized children living environment in which the strength of the field should not exceed this standard; Sweden was first recognized for electromagnetic radiation intensity over 0.2T be harmful to human body state.

For automotive products, currently in China automotive industry is not specifically related to vehicle electromagnetic radiation within the mandatory standards, the general car enterprises in production car does not specifically on the vehicle electrical equipment within the radiation on the human body detection, most also is in accordance with Chinese and international recommended reference standard of the environmental public exposure limit values of upper 100T design and manufacturing.

Electromagnetic radiation caused inside one of the culprits: car Navigation DVD system

The increasing popularity of car Navigation DVD system, is actually inside the electromagnetic radiation of large.As with good electromagnetic shielding of the original Double Din DVD Bluetooth instrument, it is the most prominent compartment electromagnetic radiation equipment, and to more with  Double Din DVD Bluetooth  system, which are ignored in the design of electromagnetic shielding "copycat" products, the electromagnetic radiation can be greatly exceed the limit value, to human caused serious harm.

Benz Navigation DVD instrument excess radiation are the main reasons are the following: 1 car GPS must pass to receive satellite signals to achieve body positioned so as to attain the user's Double Din DVD Bluetooth requirements, so as the automotive consumer electronics products car GPS in normal use in the inevitable existence of electromagnetic radiation.2 and common household appliances, Double Din DVD Bluetooth products in which the working environment is very bad, airtight, environment, shock, radiation is very difficult, if in the early product design focuses on the problem of radiation, can reduce energy reflection and overshoot, a portion of energy through the heat dissipation, reduction to space radiation energy.3 cross radiation, in the car, Double Din DVD Bluetooth products, mobile phone and other products from the owner very near, between different electronic products electromagnetic waves will interfere with each other, concentration of electrical placed together, will cause high doses of radiation, in a closed car easier to trigger a dangerous.

In 2010 February, State Quality Inspection Administration announced in 2009 Fourth Batch of product quality country is supervised selective examination announcement, in 49 samples of the Double Din DVD Bluetooth car products, 17 products are qualified products, failure rate of more than three, the product of the main reasons is not radiated disturbance exceed the standard and the power supply terminal disturbance voltages exceed the standard.

Whether radiation disturbance exceed the standard, or a power supply terminal disturbance voltages exceed the standard, have very big harm, in  TOYOTA Navigation DVD  use, radiation disturbance exceed the standard or the power supply terminal disturbance voltages exceed the standard, will seriously affect the car and other electronic products of normal use, the driver or other vehicle in passenger carrying mobile phone, Bluetooth headsets and other electronic equipment may be affected.The worst case may also produce auto system failure, accidents, if car patient life maintenance of electronic equipment, will be more dangerous.

Cause inside the electromagnetic radiation. Two: Car Audio

According to the State Quality Inspection Administration has sound quality selective examination to show as a result, in the market have two into above audio products electromagnetic radiation exceed the standard, product sampling percent of pass is only 68.4%.As the structure of look-alike car audio, electromagnetic radiation threat also exist.And Double Din DVD Bluetooth system, the original equipment for electromagnetic shielding design, and the modified sound is often neglected the problem of electromagnetic radiation, and the modified sound generally will increase power, which makes the problem of electromagnetic radiation is more outstanding.Previous reports had occurred because the modified sound caused by the electromagnetic radiation are sterile encounter.The expert emphasizes, especially the modification of sound in the bass part, is probably the most serious electromagnetic radiation source, recommended subwoofer in the design and installation, and the human body to maintain at least half meters distance.

Cause inside the electromagnetic radiation. Three: mutual interference is more terrible

Experts said, and is not to determine the electromagnetic radiation injury on the human body, electromagnetic compatibility in fact should be more public attention.Electromagnetic compatibility in simple terms, is a device or system in the electromagnetic environment can work normally in the environment, and not other things intolerable electromagnetic disturbance ability.For example, the car opens the CD causes the air bag can not normal use, such things have happened.

But consumers would also need not too worried, in the car before listing through national mandatory certification, among them one is electromagnetic compatibility, as long as it is 4S shop selling out of the car, must pass the test.But if their own modifications or additional equipment, such as the installation of reversing radar, Double Din DVD Bluetooth instrument, it will likely make the original out of the qualifying car, in the electromagnetic compatibility of the unqualified.Airbag with sound, light adapted and sound interference, adapted for use in a rather frequent.

How to reduce the electromagnetic radiation harm?

In the long-term high intensity electromagnetic radiation, may cause lesions include: Children's leukemia; induced cancer; effect on human reproductive system, reduced sperm quality, pregnant women to abortion and fetal malformation; in addition, may also influence people's cardiovascular system and visual system.

On vehicle electromagnetic radiation prevention measures to guard against computer radiation, many similar TV radiation, etc..Such as wear radiation-proof clothes, radiation apron, reduce vehicle electrical equipment used; multiple supplemental vitamin A and protein food, such as carrots, cabbage, bean curd, milk, eggs, liver, lean meat and other animal.

However, from the source to see, to reduce vehicle electromagnetic radiation is more effective and feasible.The best approach is to avoid the natural vehicle electrification modification, especially with large power electronic equipment.If there must be adapted, also must choose the advanced design of electromagnetic radiation, through the certification of qualified products, and at the time of installation and in place of the electromagnetic shielding works.

Pregnant women, children and the elderly, the car's electromagnetic radiation is extremely sensitive, therefore, in order to open and the car electric appliance centralized console distance, but also should try to arrange for them to sit in the back of a vehicle.

The five major hazards of electromagnetic radiation:

1 cardiovascular disease, diabetes, cancer is the main inducement of mutation;

2 of the human reproductive system, nervous system and the immune system can cause direct damage;

3 is to cause miscarriage, infertility, birth defects and other lesions induced factors;

4 excessive electromagnetic radiation affects children directly tissue development, bone development, decreased visual acuity; hepatic hematopoiesis function drops, severe cases can lead to retinal detachment;

5 can make the male sexual function decline, female endocrine disorders, menstrual disorders.

Explanation of terms: electromagnetic radiation

Electromagnetic radiation (electromagneticradiation): also known as electronic smoke, is determined by the spatial mutual transfer electric energy and magnetic energy, and this energy is generated by the moving charge; for example, the RF antenna is transmitting signals emitted by mobile charge, will generate electromagnetic energy.

Electromagnetic radiation is with a kind of invisible, intangible special form of matter.Human survival of the earth itself is a large magnetic field, its surface heat radiation and lightning can generate electromagnetic radiation, the sun and other planets from outer space everfount to generate electromagnetic radiation.Around in the human side of natural magnetic field, solar light, household appliances, high voltage transmission line are sent out different intensity of the electromagnetic radiation, as long as there are places there is radiation.