Visualizzazione post con etichetta SAR. Mostra tutti i post
Visualizzazione post con etichetta SAR. Mostra tutti i post

sabato 8 febbraio 2020

iPhone 11 Pro : misure indipendenti del SAR: il doppio rispetto ai limiti FCC (USA)

In una rivista dell'  Institute of Electrical and Electronics Engineers.   che è un associazione di esperti di ingegneria elettrica ed elettronica con membri di 4000.000 ca. sparsi in 160 paesi!

Un test di Penumbra Brands per misurare quanta energia di radiofrequenza è emessa da un iPhone 11 Pro ha rilevato che il telefono emette più del doppio di quanto consentito dalla Federal Communications Commission degli Stati Uniti.

La FCC misura l'esposizione all'energia RF come la quantità di energia wireless che una persona assorbe per ogni chilogrammo del proprio corpo. L'agenzia chiama questo tasso di assorbimento specifico, o SAR. Per un cellulare, la soglia di esposizione sicura della FCC è di 1,6 watt per chilogrammo.

Il test di Penumbra ha rilevato che un iPhone 11 Pro ha emesso 3,8 W / kg.

Ryan McCaughey, Chief Technology Officer di Penumbra, ha dichiarato che il test è stato fatto per la indagine condotta dal Chicago Tribune lo scorso anno. Tribune ha testato diverse generazioni di telefoni Apple, Samsung e Motorola e ha scoperto che molti hanno superato il limite di FCC.

Penumbra ha utilizzato RF Exposure Labs, un laboratorio di test SAR indipendente e accreditato per i test (The Tribune ha anche utilizzato il laboratorio con sede a San Diego per le sue indagini).
Penumbra stava conducendo il test, che includeva anche il test di un iPhone 7, per studiare le sue custodie per telefoni Alara, che secondo la società (terza rispetto a Apple)  sono progettate per ridurre l'esposizione a RF .

I telefoni per il test sono stati compreti in un negozio ... mentre  FCC ha ampiamente testato i telefoni forniti dai produttori, tra cui Apple.  !!! 

sabato 21 dicembre 2019

Test taroccati dell'FCC sui telefoni ?

Vi riporto un articolo di un giornalista investigativo del Chicago Tribune sulla rispondenza del SAR di alcuni telefoni cellulari.

Questo giornale ha comprato in negozio una decina di telefoni e li ha fatti testare da un laboratorio californiano che è riconosciuto dall'ente federale FCC a distanza di 5-10 mm e di 2 mm.

I risultati ottenuti seguendo le procedure deliberate da FCC sono stati disastrosi.

Da un confronto tecnico con FCC (ed alcuni dei produttori) viene fuori che i test effetutati da laboratorio di FCC sono stati fatti utilizzando dei telefoni avuti direttamente dai produttori ed utilizzando un software (non disponibile al pubblico) ad hoc!

Quali conclusioni ?

C'è già aperto una azione lagale contro FCC: vedremo cosa porterà.


FCC says tests find cellphones comply with federal limits on radiofrequency radiation

By Joe Mahr, Chicago Tribune, Dec 20, 2019

Responding to a Tribune investigation that found some popular cellphone models measured above federal limits for radiofrequency radiation, the Federal Communications Commission said this week that its own testing found all eight models it evaluated were in compliance.

Responding to a Tribune investigation that found some popular cellphone models measured above federal limits for radiofrequency radiation, the Federal Communications Commission said this week that its own testing found all eight models it evaluated were in compliance.
The testing commissioned by the Tribune, conducted according to federal guidelines at an accredited laboratory in California, examined 11 cellphone models from four manufacturers. The phones were purchased new. Among other findings, the Tribune reported that all four Apple iPhone 7s tested yielded results exceeding the federal limit.
At the time, Apple disputed the results and said the lab used by the newspaper did not test the phones the same way it does.
For the FCC’s tests, Apple provided the agency with two iPhone models that the Tribune tested, according to the FCC’s report. The agency also said it collected from manufacturers “any necessary test software, RF cables, and other accessories required for testing the devices." Such software was unavailable to the Tribune’s lab when testing Apple phones.
The agency’s test of an iPhone 7 yielded a result roughly 40% below the federal limit for radiofrequency radiation.
The Tribune also had reported that an iPhone X, an iPhone 8 and a Moto e5 Play from Motorola measured above the limit under certain testing conditions.
In the FCC testing, results for the e5 Play and the iPhone X were under the limit, as were those for the iPhone XS, Galaxy S9, Galaxy J3, Moto g6 Play and Vivo 5 Mini. In all, the FCC tested 11 cellphones representing eight models. The FCC did not test an iPhone 8.
The FCC’s report concluded there was no evidence of “violations of any FCC rules” for the safety limit. “The FCC’s tests confirm that all tested sample devices comply with the FCC’s strict RF exposure guidelines,” Julie Knapp, chief of the FCC Office of Engineering and Technology, said in a quote provided by the agency.
Two longtime critics of the FCC’s regulation of cellphones said they were not won over by the agency’s results. They criticized the FCC for relying on manufacturers to supply most of the phones tested and the testing software.
Photo caption: Cellphones are charged and prepped for testing at the RF Exposure Lab in San Marcos, California, in October 2018. (Brian Cassella / Chicago Tribune)
Joel Moskowitz, a cellphone expert at the University of California at Berkeley, said the FCC should have a process in place to test phones off the shelf without needing manufacturers to provide anything for the testing.
If only labs working with manufacturers can test devices, he said, “then there is a serious problem with the FCC testing protocol.”
Epidemiologist Devra Davis, who founded the group Environmental Health Trust, said the FCC’s process seemed designed to pass phones that failed the Tribune’s tests.
A spokesman for the FCC said using the companies’ software was necessary to achieve accurate results. Manufacturers, he said, can request confidentiality for their devices’ technical details to protect trade secrets. The tests were conducted independently by FCC Lab engineers, he added.
Knapp’s quote states: “FCC engineers had significant questions as to whether the tests (for the Tribune) were performed properly and consistent with FCC guidance and we expressed these concerns directly to the Chicago Tribune. Because we take seriously any claims of non-compliance with RF exposure standards, the FCC tested the same device models at our labs.”
Apple declined comment this week beyond what it has previously told the Tribune. Motorola did not respond to emails but has said its phones comply with federal standards. The company previously speculated that the Tribune’s initial testing did not trigger the e5 Play’s proximity sensors. Such sensors are designed to reduce a phone’s power when it is touching or extremely close to a person, decreasing radiofrequency radiation. Samsung did not respond to an email from the Tribune.
The Tribune’s tests were conducted by RF Exposure Lab in San Marcos, California, which for 15 years has performed radiofrequency radiation testing of new electronic devices for wireless companies. The lab is recognized by the FCC as accredited to test for radiofrequency radiation from electronic devices.
Lab owner Jay Moulton said all the Tribune’s tests were done in accordance with detailed FCC rules and guidelines. He filed a 100-page report that the Tribune shared with the government and manufacturers.
After reviewing the nine-page FCC report, Moulton questioned why the agency didn’t buy all phones off the shelf, saying it gives manufacturers the opportunity to pretest phones to ensure they would pass an FCC test. He also questioned why the FCC would need special software supplied by manufacturers to complete testing.
The sensors that reduce a phone’s power when it is near a human body should be tripped during testing without needing additional software from manufacturers, he said. “I do testing for laptops that have sensors in there, and I don’t have any special software,” Moulton said.
Moulton said that after the Tribune’s story was published, he was paid to conduct similar testing by attorneys representing plaintiffs in a class-action suit against Apple and Samsung. The suit alleges that the phone makers “intentionally misrepresented" the safety of their devices. Moulton said he is not being paid to act as an expert witness for those lawyers.
In a Dec. 5 filing, the plaintiffs’ lawyers said Moulton’s lab tested an iPhone 7+, an iPhone 8 and an iPhone XR as well as the Samsung Galaxy S8, Galaxy S9 and Galaxy S10. According to the filing, Apple phones tested above the federal limit, with the highest reading coming from an iPhone 7+, at more than twice the limit.
Neither Apple nor Samsung has filed a response in court.
Debate about the safety of cellphones has raged for years. High levels of radiofrequency radiation can heat biological tissue and cause harm, but it is less understood whether people, especially children, are at risk for health effects from exposure to low levels over many years of cellphone use.
Authorities in the 1990s set the federal exposure limit based solely on the heating risks of cellphone radiation, building in a 50-fold safety factor. But some researchers — and lawyers — have questioned whether the limit is safe enough. Those questions have spawned a long-running lawsuit against phone makers, carriers and trade groups over cancer risks.
The Tribune’s testing had two phases. One tested phones at the same distance from the body as manufacturers chose for their own premarket testing: from 5 to 15 mm away, depending on the model. This phase included retests of several models after manufacturers gave feedback on the test results.
The second phase tested phones at 2 mm from the body, to represent the phone being carried in a pocket.
The FCC’s recent study did not test phones at the 2 mm distance. In the Tribune testing, only one of the cellphone models met the federal safety standard at that distance.

giovedì 16 giugno 2016

Anche la Apple manda segnali (piccolissimi) di pericolo !!!


Apple in merito all' i-Phone avverte che i valori del SAR possono essere maggiori dei valori limite imposti,    se è tenuto a distanza inferiore ai 15 millimetri dal corpo ! 

Notare  15mm = 1,5 cm  quindi non attaccato allo orecchio !

Aggiungo che loro si riferiscono solo a danni da riscaldamento e non a quelli provocati dagli effetti non-termici.

Ovviamente il tutto scritto in caratteri ... microscopici !!!

martedì 18 marzo 2014

SAR Tick: un'iniziativa delle società di telefonia per informare i clienti sul potenziale rischio

Le aziende del settore delle telecomunicazioni hanno lanciato una 'campagna' informativa sul SAR Specific Absorption Rate dei telefonini.

Questo è valore calcolato in base alla misurazione e simulazione su un 'manichino' dello assorbimento delle radiazioni nella testa e corpo di un essere umano.

Ovvviamente è riferito solo ai danni da riscaldamento in quanto LORO partono dall'assunto (ahimé seguito dalle normative ) che gli effetti siano solo quelli termici .

C'è un sito      in cui potete andare a vedere i valori relativi al vostro cellulare.  Ovviamente obiettivo =  zero !!!

Che dire ?

Gli ambientalisti ed attivisti di tutto il mondo lottano contro questo assunto , comunque meglio che seguitare a ripetere che tutto va bene , che non fanno  male ...       

martedì 24 dicembre 2013

iPad: quanti avvisi di sicurezza nelle istruzioni

Andate a vedere quanto si dilunga Apple sugli avvisi sulla sicurezza dell'iPad, ivi incluso le interazioni con radiofrequenze

Nel manaule, oltre a riportare i valori di SAR nelle varie tipologie di utilizzo e per varie bande di frequenza, aggiunge chiaramente di limitare il tempo di utilizzo (e specifica in modo wireless), ma anche di mettere più distanza possibile tra l'apparecchio ed il proprio corpo !


un produttore che ti vende un oggetto che serve per comunicare, ma anche per farci sempre più attività ... e poi ti dice - anche se di nascosto con un carattere tipografico piccolo - di usarlo meno tempo possibile e di tenerlo più lontano possibile ,   che  senso  ha ?!   Non è tutto aberrante ?!

venerdì 17 maggio 2013

L'India bloccherà l'import di cellulari che non riportano il livello di radiazioni emesse

Il Ministero competente rende obbligatorio la indicazione in modo ben visibile del SAR dello apparecchio.  Vedere articolo , altrimenti saranno bloccati all'import.

mercoledì 26 dicembre 2012

Trovato un sistema di misura di assorbimento di CEM nel cervello

e' stato pubblicato   uno studio che riporta la misurazione tramite Risonanza Magnetica del livello di assorbimento di radiofrequenze nel cervello (sperimentata sui bovini)
La tecnica è la Termografia con Risonanza Nucleare

Assessing the effects of cell phone radiation on brain tissue
Researchers have developed a non-invasive NMR-based method to measure the effects of cell phone radiation on brain tissue. To demonstrate the technique, David H. Gultekin and Lothar Moeller measured the amount of electromagnetic energy from cell phone radiation that was absorbed by bovine brain tissue and a gel with similar electrical and thermal parameters. Cell phones are one of the main sources of exposure to radiofrequency (RF) fields, and the World Health Organization recently classified RF fields as possibly carcinogenic based on an increased risk for brain cancer associated with cell phone use. Cell phone RF energy absorbed by brain tissue is converted into heat, and the authors used NMR to create high-resolution 3D images of the resulting thermal fields and confirmed the accuracy of these measurements using fiber-optic temperature sensors. Regular cellular handsets cannot be used in the strong magnetic fields generated by NMR systems; hence the authors developed an antenna setup that allowed them to non-invasively measure the absorption of cell phone radiation using NMR. The study suggests that NMR can be used to characterize hot spots from absorbed cell phone radiation in both brain tissue and gels, and the method could be refined for in vivo measurements of human brain tissue, according to the authors.

venerdì 10 agosto 2012

Bluetooth ! non usare

In questa nota di Cindy Sage, si parla di numeri : un apparecchio Bluetooth ha il SAR pari a 0,23 W/Kg. Se lo confrontate grazie alle tabelle di SAR dei telefoni cellulari, trovate alcuni telefoni che hanno valori inferiori . La differenza è che il Bluetooth si ATTACCA all'orecchio e rimane li' per ore. Ricordate che già diversi produttori riportano nelle istruzioni allegate al telefono, magari scritto con carattere microscopico, che è bene utilizzare il telefonino a circa 2,5 cm dall'orecchio !!!