Maryland's Defense Patent Database

The defense community in Maryland is an R&D powerhouse.

Use this database to see the innovative patents that are poised for commercialization.

Method and apparatus for producing spatialized audio signals

Patent image
NRL

A method and apparatus for producing virtual sound sources that are externally perceived and positioned at any orientation in azimuth and elevation from a listener is described. In this system, a set of speakers is mounted in a location near the temple of a listener's head. A head tracking system determines the location and orientation of the listeners head and provides the measurements to a computer which processes audio signals, from an audio source, in conjunction with a head related transfer function (HRTF) filter to produce spatialized audio. The HRTF filter maintains the virtual location of the audio signals/sound, thus allowing the listener to change locations and head orientation without degradation of the audio signal. The audio system of the present invention produces virtual sound sources that are externally perceived and positioned at any desired orientation in azimuth and elevation from the user.

Inventors: 
Ballas, James A.
Patent Number: 
Technical domain: 
Communications
FIle Date: 
2005-10-31
Grant Date: 
2008-08-19
Grant time: 
1,023 days
Grant time percentile rank: 
18
Claim count percentile rank: 
3
Citations percentile rank: 
2
'Cited by' percentile rank: 
1
Assignee: 
US NAVY