Review and research of covers of Pong. Protect iГаджеты and a carrier
When speech comes about harm of electronic radiation (EMI) generated by the mobile phone, reaction at public happens different. Someone, cunning smiling, suggests especially hypochondriac индивидумам to carry a hat from a foil, someone cleans phone far away from the head while the interlocutor on other end of a wire will not take the call, and someone at all заморачивается. After all, radiation exists, and it influences our organisms. Any "uncle Petja", stinking cheap cigarets a floor is lower in the windows opened in hot night, certainly renders worse effect on sleeping bodies of neighbors, though if it is possible to minimize harm why not to test? We will have a talk about Pong covers for iPhone and iPad which not only reduce level of EMI generated by devices below and increase a potentiality. So, the tablet option possesses an interesting design of the Origami type, plus accessories of type do better reliability of communication. Let’s check.
Skin, лексан, origami and soft-touch
Without pressing at all in technical details of Pong, accessories to me were pleasant purely outside. In this case it is covers for iPhone 4/4S and for new iPad.
Pong for phone is executed from plastic with effect of soft-touch and for the 1st look especially is not allocated among an assembly of the same slips. But registration of the back panel causes kind associations with Vertu, and some massiveness is perceived positively. A design at a cover reliable, corners and sides of iPhone are protected, the back panel too, at all this is open access to all governing bodies.
To the touch accessory pleasant, material not especially easily soiled and quite ukhvatisty. There are some options of the design, differing color and a structure. Not including described above soft-touch there is a model with effect of skin.
The decent thickness of a back wall is caused not by a design delicacy. In it the main counter of an accessory is covered: the block of the passive aerials reducing level of electronic radiation of phone and if is more exact, redirect than it aside from the head of the user.
At the left – an orientation of radiation of the iPhone without a cover, on the right – with put-on Pong.
I feel, the reader thinks again of zirconic bracelets and hats from a foil. Friends, do not hurry to throw in the founder tomatoes. I had just the same thoughts at fluent research of lines of accessories on an official site of Metabola group of companies which is exclusive supplier of products of Pong Research Corporation (USA). To this moment I predetermined many hours of personal time and on it we will in details stop a bit later. For now we will look at Pong for new iPad.
In respect of materials and a design this cover is more interesting than telephone model. Pay attention to a forward cover. It is constructed on the basis of principles of origami and, being similar outside with Apple Smart Cover, can offer much more possibilities. Is, naturally, ordinary option for the press …
… and photoframe mode.
Next tilt angle inaccessible to a firm accessory of Apple:
For a portrait mode too there is a way how to re-embody a cover in a support:
Here so too it is possible:
Cover components are more interesting also. Without considering some plastic the developer applied a genuine leather and лексан. Joint processing and association of materials allowed to achieve the most interesting effect. Skin became stronger, it hypoallergenic, is not stretched, does not burst, does not exhale a smell (I like a skin smell, but there are acquaintances whom it irritates).
The internal part of origami cover is executed from the processed suede (more softly usual
and lost some pile). The plastic slip inside is also trimmed by suede, and under it disappear passive redirect electronic radiation of the aerial.
By the way, a slip not absolutely usual and matter is not in a silicon interior or in high-quality furnish. It appears, in iPad there is the hidden sensor, which Apple was advertized never. On the last measure, it declares Pong Research Corporation, the developer of considered covers. If it to activate, the capacity of the 3G-module falls approximately for 75 % for the sake of safety of the user. And there is it when in a certain proximity from a tablet (about 10 mm) there is an obstacle, any object, whether it be the head of the user or, for example, a cover frame. In the latter case the radio module constantly works at the reduced capacity, the cover without need with iPad usually does not act in film.
What such sensor, from where it why Apple it did not mention? These questions span at me in the head, well and though what other user of iPad they too would appear. Very much all this is magnificent. To understand a question, I addressed to experience of zabugorny colleagues from notable and dear Wired edition what had an access to necessary for testing of characteristics of Pong to very expensive and rare equipment. I will remind that in a past the Wired publishing house the first is direct issued the interactive magazine for iPad and showed the future of the cardboard press.
Well, we pass to a technical part of article in what we will try to deal not only with the unsafe sensor in iPad, but also we will find out, and whether really Pong protects the user from electronic radiation of the cellular module and whether it influences a communication quality. After all actually not discrepancy to shield EMI, but it is heavy to make it, without having done much harm to the radio module.
The hidden sensor
In iPad by means of ordinary search of Google it is heavy to dig out any data on existence of the sensor of approach (proximity sensor). Well and why such in a tablet? In phone it is responsible for screen clearing when the device is brought to an ear during conversation. iPad in such mode is not used.
After all, journalists of Wired after all found a mention of the fantastic sensor in the report of the Compliance Certifications Services (CCS) organization which that prepared for Apple, and in March 1, 2011 it was sent in the Federal commission of communication of the USA (FCC). The last defines admissible norms of specific factor of absorption of electronic energy (Specific Absorption Rate, SAR). The document is called «The report on SAR assessment» (SAR Evaluation Report), in other words, depicts, what level of electronic radiation is generated by tablet radio modules. Deeply in the report, in the section «Decrease in capacity by way of measurement» («Power Reduction By Sensing») is described that sensor and its work:
In the document it is considered not only the sensor, but there are SAR measurements at its activation.
It is sure, some readers already had a question, and what it for SAR such, it is specific factor of absorption of electronic energy? It is possible to address to Wikipedia where it is written that is an indicator defining energy of an electronic field, being allocated in fabrics of a body of the person in a second. It is somehow very clever. If it is simpler, SAR specifies a certain impact of electronic radiation of the device in numbers, in this case it is energy absorbed by fabrics. While negative effects of it it is not revealed, impact on the person is very insignificant and term for thorough research of a question is rather small. But they can be shown over time. After all any processes in fabrics occur at energy absorption. Small local heating, for example.
It is natural, heavy to imagine a situation when the tablet will be at distance of 10 mm from the head of the user. Unless the hypothetical — the person the sour film looked, sitting at a table over a tablet and and fell asleep, having fallen the person directly to the aerial of the 3G-module which, judging by the scheme above, is to the right of the iPad 2 chamber or new iPad. In the same place the sensor which right there will reduce modem capacity is established also, having found a rigid body, and as the result, will decrease level of electronic radiation.
The journalist of Wired even addressed to magicians from iFixit which at analysis of tablets of Apple did not focus attention on any cunning sensors, it is simple them without having found. But the indirect demonstration after all exists. In the device 3G/4G-version in the designated place there is a small plastic panel with the certain electronic components one of which can absolutely appear the approach sensor. In Wi-Fi of the iPad version of such panel is not present. Below on a photo the arrow showed this of type the sensor (the picture is clickable):
In Pong discrepancy with casual overlapping of a sensor of approach is solved is ordinary — over it there are no parts of a cover, so, the tablet 3G-module always works at full capacity while the user will not fall asleep over it. But it everything in the theory, and in practice existence of the fantastic sensor was checked in one of FCC laboratories — Cetecom.
Experience was carried out in the cunning room isolated from an external radio emission and sheathed by a sound-proof material. The special aerial fixed capacity of cellular translation of iPad without a cover, in a cover of Pong and in the certain foreign cover blocking the sensor of approach.
The result really confirmed Pong Research Corporation data. Without a cover and in Pong the capacity of a 3G-signal of a tablet made 22,4 dBm but when the foreign cover blocked the sensor, the result made 16,4 dBm. As the logarithmic size, instead of linear in this case is used, falling on 6 units means decrease in capacity of a signal for 75 %.
In real life it is not so terrible, as it seems at the 1st look. Difficulties can seem only at a weak signal of a cellular network, plus falling of capacity of the transmitter in a tablet influences speed of loading of data from the subscriber in the Network, but not opposite. Roughly speaking, the distance on which the tablet can be connected to a cellular tower is miniaturized. At decrease in capacity of the transmitter for 75 %, the distance of possible connection is miniaturized for 50 %.
What here to tell, specialists from Pong Research Corporation good fellows that features of a design of a tablet and its work with the cellular module considered, but the main technical know-how in Pong — is the antenna block, protecting the iГаджета carrier from electronic radiation. Give at present we will study its properties closer.
To redirect electronic radiation it is better, than to shield
The developer does not accent attention on a technical component
of unique technology, but that it is effective, also was proved in the experimental way.
For this purpose in Cetecom laboratory the special board with a robohand and the sensor defining level of SAR in so-called «a phantom body» (Body Phantom) is used. It simulates a body of the person and possesses similar properties. In fact, water with a small amount of ethanol (it is alcohol) and other substances that in aggregate feigns behavior of real fabrics of a body at radiation.
The unit for SAR measurement. The radiator, in this case a tablet, is located under a tray with «a phantom body»
During the iPad tests worked at frequency of WCDMA of 1880 MHz. The difference in specific factor of absorption of electronic energy at tablet work without a cover and in Pong made about two thirds. Exact numbers of Wired at the desire of Cetecom does not open. In other words, the accessory really works, and the result of tests approximately coincides with official data: SAR of 1,44 MWt/g (a milliwatt on гр) when using tablet without a cover and 0,445 MWt/g — c Pong. Similar results were received by Wired during independent tests in 2009 when Pong Research Corporation only entered the market with the first covers for iPhone.
The unit for measurement of level of SAR in phones
I will remind that Pong does not shield electronic radiation and does not suppress a signal as it is done by some other covers, in particular the steel. In the latter case the accumulator charge as phone constantly tries to hold a signal at high level is more strongly spent or to find cellular towers closer, capable to provide more comfortable working conditions in a cellular network. The problem of Pong consists in change of an orientation of a field surrounding phone. Pong "selects" radiation from the head and "translates" it back where there is a hand. To a hand all the same as it is not responsible for thought processes.
Thus, considered accessories have one more plus — some economy of a charge of the accumulator at the expense of absence of shielding of a signal of the cellular module. Moreover, on an official site it is told even about strengthening of capacity of a signal of the mobile device at the expense of Pong, but important results are observed only at comparison with other covers. If to compare to iPhone or iPad without a cover, the difference will be insignificant.
Not to trust Wired of events is not present, existence of patents for the considered development at Pong Research Corporation too speaks about much. Not including that, Pong covers unique passed FCC test with positive result. In other words they really work that was confirmed in the course of postoroniy researches. Confirmations to magic properties of their products it is impossible to find very unusual occurrence in the modern world when cunning developers throw the gone crazy buyers clever words and loud technical definitions, but, as well as denials. On it quite often successful realization of expensive things also is under construction.
In this case products expensive, but they workers. Moreover, to accessories is what to offer not including protection against electronic radiation:
- excellent mechanical protection of iГаджетов;
- stylish design;
- qualitative materials;
- the accounting of features of a design of iPad with the cellular module, finally that improves a communication quality;
- functional origami design in Pong for iPad.
To districts of the Russian Federation Pong Research Corporation production is extended exclusively by Metabola group of companies. To familiarize with the vsedostupny range it is possible on an official site of the Russian representation: MYPONG.RU