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Knowles boosts sound performance in small mobile devices

February 21, 2012

For Immediate Release

Alexander Tarzi
Knowles Sound Solutions
+43 1 60870 1649

NBass™ Virtual Back Volume Technology Doubles the Effective Air Volume in Miniaturized Loudspeaker Systems

Vienna, Austria, February 21, 2012 – 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.

“Consumers are demanding better sound performance for the multiple music, video, gaming, and telephone applications provided by the latest generation of smart portable devices,” said Ernst Müllner, President, Knowles Sound Solutions. "Due to the space gained by using N’Bass™, mobile phone and computing manufacturers have more flexibility to design solutions with superior sound and optimized space efficiency.”

Similar to a sponge, the N’Bass™ material adsorbs the air in the loudspeaker box. In this way, it virtually increases the available back volume for the loudspeaker. In addition, the material 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 the only supplier who offers this specific technology for miniaturized loudspeaker systems.

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About Knowles – Founded in 1946, Knowles Electronics is the leading global supplier of advanced micro-acoustic and human interface solutions, including hearing aid components, MEMS microphones as well as dynamic speakers and receivers. Providing unique technology expertise and a broad product portfolio Knowles serves the markets for hearing health, mobile communications, consumer electronics, and professional audio. Headquartered in Itasca, USA, Knowles has more than 6,000 employees in 17 locations worldwide. For more information visit the Knowles website at

Knowles is owned by the Dover Corporation, a multi-billion dollar diversified producer of innovative equipment, specialty systems and value-added services. Visit for more information.

All product and trade names are recognized as the property of their respective owners.

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