Mobile telephones: a comparison of radiated power between 3g voip calls and 3g vocs calls

ABSTRACT The purpose of this study is to assess the mean RF power radiated by mobile telephones during voice calls in 3G VoIP (Voice over Internet Protocol) using an application well known

to mobile Internet users, and to compare it with the mean power radiated during voice calls in 3G VoCS (Voice over Circuit Switch) on a traditional network. Knowing that the specific

absorption rate (SAR) is proportional to the mean radiated power, the user's exposure could be clearly identified at the same time. Three 3G (High Speed Packet Access) smartphones from

three different manufacturers, all dual-band for GSM (900 MHz, 1800 MHz) and dual-band for UMTS (900 MHz, 1950 MHz), were used between 28 July and 04 August 2011 in Paris (France) to make

220 two-minute calls on a mobile telephone network with national coverage. The places where the calls were made were selected in such a way as to describe the whole range of usage situations

of the mobile telephone. The measuring equipment, called “SYRPOM”, recorded the radiation power levels and the frequency bands used during the calls with a sampling rate of 20,000 per

second. In the framework of this study, the mean normalised power radiated by a telephone in 3G VoIP calls was evaluated at 0.75% maximum power of the smartphone, compared with 0.22% in 3G

VoCS calls. The very low average power levels associated with use of 3G devices with VoIP or VoCS support the view that RF exposure resulting from their use is far from exceeding the basic

restrictions of current exposure limits in terms of SAR. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS

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Protection (Frequencies and Protection Division), Bouygues Telecom, Issy-les-Moulineaux, France Dragan Jovanovic, Guillaume Bragard & Sébastien Chauvin * Département Electromagnétisme

(Electromagnetics Department), DRE, Supélec, Gif-sur-Yvette, France Dominique Picard Authors * Dragan Jovanovic View author publications You can also search for this author inPubMed Google

Scholar * Guillaume Bragard View author publications You can also search for this author inPubMed Google Scholar * Dominique Picard View author publications You can also search for this

author inPubMed Google Scholar * Sébastien Chauvin View author publications You can also search for this author inPubMed Google Scholar CORRESPONDING AUTHOR Correspondence to Dragan

Jovanovic. ETHICS DECLARATIONS COMPETING INTERESTS The authors declare no conflict of interest. RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE

Jovanovic, D., Bragard, G., Picard, D. _et al._ Mobile telephones: A comparison of radiated power between 3G VoIP calls and 3G VoCS calls. _J Expo Sci Environ Epidemiol_ 25, 80–83 (2015).

https://doi.org/10.1038/jes.2014.74 Download citation * Received: 17 March 2014 * Revised: 01 September 2014 * Accepted: 03 September 2014 * Published: 05 November 2014 * Issue Date: January

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