Spatial Audio
- 1. ACADEMY OF TECHNOLOGY PRESENTATION ON SPATIAL AUDIO PAPER CODE : EC-681 Submitted by:- Arnab Banerjee(19) Atrija Singh(24) Guided by: Prof. NUPUR CHHAULE
- 2. SOUND AN IMPORTANT PART OF HUMAN LIFE • Communication • Sense Making • Perception • Pleasure • etc……
- 3. HUMAN AUDITORY PROCESSING • Captures • Analyze • Process In Spatial Audio , sound is usually created by relative compact sources that occupy a small region.
- 4. DISCRETE TIME SIGNAL PROCESSING • Location • Direction • Ambience Effective Method: • Microphone Array • Head Related Transfer Function (HRTF)
- 6. SPATIAL AUDIO HISTORY • Stereo Recordings -- able to pan a phantom source between two speakers • 5.1 audio -- horizontally pan a source • 7.1 audio -- provides more elevation • Virtual Reality (VR) era – ambisonics, provides true audio immersion . Simulate real world acoustics in VR.
- 7. SPATIAL AUDIO ROLE IN VR Examples : • If someone calls us, we immediately know where to look • If a train passes by we can feel from which direction it passes Reason : • Directional perception
- 8. THEORY • How Spatial Audio Works in VR In VR user is put into the middle of the action and he might not even know where to look. Spatial Audio provides a powerful tool to control user attention by providing spatial audio queues from the direction of interest that a user can be guided through Virtual Reality • What will Happen if Spatial Audio is not provided in VR The illusion of being in a different world immediately breaks as soon as there is a mismatch between our senses. Particularly the lack of spatial audio immediately breaks in the VR immersion
- 9. SPATIAL AUDIO IN REAL WORLD • Time Difference https://developers.google.com/vr/concepts/spatial-audio • At higher frequencies , λ< d
- 11. SPATIALIZING SOUND IN VR https://developers.google.com/vr/concepts/spatial-audio
- 12. APPLICATIONS • Virtual and Augmented Reality Games • Recording of Live Concert to give the viewers the virtual feeling of being present at the concert • Hearing devices for patients , to make them feel the current situation where they are present.
- 13. ADVANTAGES • Virtual and Augmented Reality Games • 360o videos • Movies • Animations • Recording of Live Concert to give the viewers the virtual feeling of being present at the concert • Hearing devices for patients, to make them feel the current situation where they are present.
- 14. DISADVANTAGE • Costly and complex to design • Needs precise algorithms and calculations • complex structure of microphone array
- 15. FUTURE SCOPES • Spatial Audio is an emerging trend • Many researches are being carried out • VR and AR have most of its applications • This can be further implemented in medical devices • Spatial Audio can also be used as a tool for Medical Students • Most of Future Games will have this • This will further provide more and more immersion in sound technology with the user
- 16. CONCLUSION • Spatial Audio is a very emerging technology in the current era. • Applying spatial audio in many day to day life devices will change the scenario of viewing the world. • The addition of Spatial Audio in AR and VR in most devices will have a great positive impact in human life.
- 18. REFERENCES • https://en.wikipedia.org/wiki/Ambisonics • https://www.microsoft.com/en-us/research/project/spatial-audio/ • https://en.wikipedia.org/wiki/Head-related_transfer_function • http://www.spatialaudio.us/ • https://en.wikipedia.org/wiki/Virtual_reality • https://en.wikipedia.org/wiki/Microphone_array • https://www.youtube.com/watch?v=Na4DYI-WjlI&t=755s • https://developers.google.com/vr/concepts/spatial-audio