Knowl's (www.knowles.com) N'Bass™ Virtual Back Volume technology is a sound enhancing technology to increase the acoustic performance in consumer devices with small form factors.

It stands for "enhanced bass" and enables the smallest possible acoustic designs in smart phones, tablets and other portable media devices. Knowles is the only supplier who offers this specific technology for miniaturized loudspeaker systems.

N'Bass 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 up to 50 % smaller loudspeaker box designs with the same performance. It also facilitates the usage of bigger loudspeakers, thus providing superior sound performance within the same gross application volume.

Doubling the effective air volume in miniaturized loudspeaker systems, it has the following features:

- Best sound in small spaces
- Better acoustic performance: more bass
- Smallest possible designs
- Optimized space efficiency
- Bigger speakers with same gross volume                                                                                                    
- No negative influence on  antenna performance
- Non-conductive material

Applications
- Smartphones
- Tablets PCs
- Portable media devices