N’Bass Virtual Back Volume technology boosts mobile sounds by doubling air volume in loudspeaker
February 20, 2012 // Julien Happich
Knowles Sound Solutions has launched a sound enhancing technology to increase the acoustic performance in consumer devices with small form factors. N'Bass stands for “enhanced bass“ and enables the smallest possible acoustic designs in smart phones, tablets and other portable media devices.
The patent pending N‘Bass Virtual Back Volume technology is a custom-developed material which increases the back volume seen by the loudspeaker by up to 100 %. It provides either better acoustic performance – specifically more bass – or smaller loudspeaker box designs while keeping the same performance. N‘Bass also facilitates the usage of bigger loudspeakers, thus providing superior sound performance within the same gross application volume.
Similar to a sponge, 2 grams of the N'Bass material have a surface area of about a football field. As Knowles Sound Solutions’ Head of Global Product Management, Mark Hannah describes it, “the material adsorbs the air in the sealed loudspeaker box, acting as an analogue pressure sucker and making it easier for the membrane to vibrate at full amplitude for when it is needed most, at the lower bass frequencies”. Typically, the small back volumes used in mobile devices (due to space constraints) tend to increase back pressure, hence limiting the speaker membrane’s inward amplitude and affecting the bass frequencies. The material desorbs the air molecules when the membrane vibrates out of the speaker box. This virtually increases the available back volume for the loudspeaker and using this technology, the company has measured a difference in the resonance frequency of about 150Hz, with a sound pressure level-boost below resonance frequency of approximately 3dB compared to standard loudspeaker boxes.
The material, which took over two years to develop, is non-conductive and has no negative influence on antenna performance. The first smartphones to incorporate the technology have recently been launched by tier-1 handset OEMs and are currently in mass production. Knowles is currently the only supplier who offers this specific technology for miniaturized loudspeaker systems.
Visit Knowles Sound Solutions at www.knowles.com
How will deep learning change SoCs?
March 31, 2015
Deep Learning is already changing the way computers see, hear and identify objects in the real world.
Electronics printed in France
Sony licenses bonding technology from Ziptronix
Delphi selected to build Audi’s autopilot computer
Medical chip market on 12% CAGR
Philips offloads LED lighting components unit for USD2.8bn
March 31, 2015
Philips has agreed to sell an 80.1 percent stake in the company's lighting components division for $2.8 billion to Go Scale ...
Imec and sureCore partners on 28nm SRAM
Analysts cool on Intel/Altera combo
A new candidate for ultra-thin optoelectronics: DNA-peptide
- High-Speed, Real-Time Recording Systems Handbook
- New Linear Regulators Solve Old Problems
- Intelligent Over Temperature Protection for LED Lighting Applications
- Intel helps to Turbocharge Infotainment Systems Designs
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, DecaWave is offering EETimes Europe's readers the chance to win two TREK1000 kits to evaluate its Ultra-Wideband (UWB) indoor location and communication DW1000 chip in different real-time location system topologies.
Worth €947, the kit allow designers to prove a concept within hours and have a prototype ready in days. Based on the two-way ranging scheme, the kit lets you test...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.