Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Optical Solution Revives Hands Free Mobile Telephones

03.09.2002


Hands free sets for mobile phones may be on the verge of a big comeback thanks to new research by the University of Warwick. Many people used hands free sets in an attempt to avoid what they perceived as a microwave radiation risk from holding a mobile phone close to one`s head.

However when it was pointed out that the standard wire based hands free kit actually itself acted as an aerial amplifying any signal to the users head the kit fell out of favour with this type of user.

Now researchers led by Professor Roger Green at the University of Warwick have found and patented a way of producing optical signal based hands free devices for mobile phones that do indeed shield users who fear the microwave radiation from mobile phones.

The researchers have developed a simple means of converting electrical signals from the mobile phone into an optical signal that is guided up through a plastic tube to an ear-piece where the signal is converted back into an audible form. This plastic tube cannot act as a radio antenna so no radio energy is channelled to the users head.

The technology also uses a crystal based ear-piece speaker instead of an electromagnetic coil to further minimise the action of stray electric fields.

Roger Green, Professor of Electronic Communication Systems,
School of Engineering, University of Warwick,
Coventry CV4 7AL.Tel : +44 (0)24 76 523133
Mobile +44 (0)7855 901515
Roger.Green@warwick.ac.uk

Peter Dunn | AlphaGalileo

More articles from Information Technology:

nachricht Researchers build transistor-like gate for quantum information processing -- with qudits
17.07.2019 | Purdue University

nachricht New DFG Research Group "Metrology for THz Communications"
17.07.2019 | Technische Universität Braunschweig

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First-ever visualizations of electrical gating effects on electronic structure

Scientists have visualised the electronic structure in a microelectronic device for the first time, opening up opportunities for finely-tuned high performance electronic devices.

Physicists from the University of Warwick and the University of Washington have developed a technique to measure the energy and momentum of electrons in...

Im Focus: Megakaryocytes act as „bouncers“ restraining cell migration in the bone marrow

Scientists at the University Würzburg and University Hospital of Würzburg found that megakaryocytes act as “bouncers” and thus modulate bone marrow niche properties and cell migration dynamics. The study was published in July in the Journal “Haematologica”.

Hematopoiesis is the process of forming blood cells, which occurs predominantly in the bone marrow. The bone marrow produces all types of blood cells: red...

Im Focus: Artificial neural network resolves puzzles from condensed matter physics: Which is the perfect quantum theory?

For some phenomena in quantum many-body physics several competing theories exist. But which of them describes a quantum phenomenon best? A team of researchers from the Technical University of Munich (TUM) and Harvard University in the United States has now successfully deployed artificial neural networks for image analysis of quantum systems.

Is that a dog or a cat? Such a classification is a prime example of machine learning: artificial neural networks can be trained to analyze images by looking...

Im Focus: Extremely hard yet metallically conductive: Bayreuth researchers develop novel material with high-tech prospects

An international research group led by scientists from the University of Bayreuth has produced a previously unknown material: Rhenium nitride pernitride. Thanks to combining properties that were previously considered incompatible, it looks set to become highly attractive for technological applications. Indeed, it is a super-hard metallic conductor that can withstand extremely high pressures like a diamond. A process now developed in Bayreuth opens up the possibility of producing rhenium nitride pernitride and other technologically interesting materials in sufficiently large quantity for their properties characterisation. The new findings are presented in "Nature Communications".

The possibility of finding a compound that was metallically conductive, super-hard, and ultra-incompressible was long considered unlikely in science. It was...

Im Focus: Modelling leads to the optimum size for platinum fuel cell catalysts: Activity of fuel cell catalysts doubled

An interdisciplinary research team at the Technical University of Munich (TUM) has built platinum nanoparticles for catalysis in fuel cells: The new size-optimized catalysts are twice as good as the best process commercially available today.

Fuel cells may well replace batteries as the power source for electric cars. They consume hydrogen, a gas which could be produced for example using surplus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on UV LED Technologies & Applications – ICULTA 2020 | Call for Abstracts

24.06.2019 | Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

 
Latest News

Chemistry of the cosmological dark ages studied in the lab

19.07.2019 | Physics and Astronomy

Genetic differences between strains of Epstein-Barr virus can alter its activity

18.07.2019 | Health and Medicine

Algae-killing viruses spur nutrient recycling in oceans

18.07.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>