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
Exploring through-wall presence detection
July 01, 2015
This month, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers ...
High-speed converters aid record terabit field trial
Sony reaches for the crowd with e-paper universal remote
Two-switch-quasi-resonant Flyback converter
Could India's analog wafer fab be moving south?
Do head-up displays lead the wrong way to safety?
June 30, 2015
In vehicles, head-up displays (HUDs) have been developed to reduce driver distraction and help drivers to keep their eyes ...
Merck buys display quantum dot company
ZF sets course to driver assistance
Advanced packaging to boost photolithography market, says Yole
- Critical Requirements in High Speed Signal Generation Applications
- The 400XAC Series: Two Major Advantages that Simplify Functional Testing
- A Smart Way to Drive ECU Consolidation
- Autonomous Driving: An Eye on the Road Ahead
InterviewCEO interview: Cadence is about enablement, collaboration
EDA companies are being asked to provide expertise from the circuit- to the system-level observes Lip-Bu Tan, CEO of EDA software vendor Cadence Design Systems Inc. Covering such a breadth of endeavour ...
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, Novelda is giving away two full XeThru Inspiration kits worth 1499 US Dollars each, for EETimes Europe's readers to experiment first hand with its XeThru technology.Based on the use of radio waves, rather than infrared, ultrasound or light, the company's X2M1000 Inspiration modules can detect presence just from the chest movement while breathing, and measure both the rate and... 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.