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Supercapacitors ‘BriteSound’ For Mobile Phones

Australian supercapacitor maker, Cap-XX, has introduced a supercapacitor based technology, ‘BriteSound’, for mobile phones that it claims can produce greatly improved sound quality.

“With MP3-ready handsets growing in popularity, consumers want an iPod-quality audio experience without the distortion that interrupts music when the phone has to handle other peak-power functions,” said CAP-XX CEO, Anthony Kongats. “We are working with key mobile-phone manufacturers and expect the first designs that are power-boosted by our supercapacitors to hit the market in 2008.”

Good quality sound at high volume, especially of bass notes, puts a substantial drain on the cellphone’s battery, which also has to power normal phone functions. As the current drawn from any battery increases its voltage drops and these voltage fluctuations produce varying kinds of distortion in any music pumped through an amplifier driven by that battery.

A capacitor is able to take in electrical energy, very quickly, during times of low battery load and release this energy, also very quickly, at times of peak load to supplement battery power and smooth out voltage fluctuations. However without the technology of supercapacitors – which are able to store very large amounts of electrical energy in a very small volume – capacitors would be unable to store sufficient energy to improve sound quality in a cellphone.

Capacitance is measured in farads. However, prior to the development of supercapacitors a farad was such a large quantity that the usual units were microfarads (one millionth of a farad) or even picofarads. The supercapacitors developed by Cap-XX for its BriteSound application are about 0.5 farad, but other supercapacitors for different applications can have capacitances of several thousand farads.

Cap-XX claims that its BriteSound power architecture for mobile phones is able to boost in peak power to the loudspeakers to more than five watts. And it claim to have tested a standard mobile phone and found that it delivered peak power of 1.2 watts to 2.25W. “This lack of power can result in thin-sounding music with a weak bass beat,” it said, adding that “another problem arises when the battery becomes taxed from simultaneous peak power demands to transmit wireless data and respond to a network poll [networks periodically poll phones to locate them and determine needed transmit power] while the user is also listening to music.

BriteSound is the second CAP-XX BritePower architecture for mobile phones, joining the BriteFlash solution which uses a supercapacitor to help produce a high-brightness LED flash.

Source:? iTWire

Supercapacitors, BriteSound, Cap-XX, Mpbile Phones, Technology, iPod, Digital Sound

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