SuperLectures.com

BROADBAND DIRECTION ESTIMATION METHOD UTILIZING COMBINED PRESSURE AND ENERGY GRADIENTS FROM OPTIMIZED MICROPHONE ARRAY

Microphone Array Signal Processing

Full Paper at IEEE Xplore

Presented by: Jukka Ahonen, Author(s): Jukka Ahonen, Ville Pulkki, Aalto University, Finland

This paper proposes a method for analyzing the direction of the arrival of sound by estimating the sound intensity vector from the pressure and energy gradients of closely-spaced omnidirectional microphones depending on frequency. Microphones with relatively large housing, which cause shadowing, are used here to provide inter-microphone level differences in order to compute the energy gradients at high frequencies. The proposed method is evaluated in the direction analysis of a spatial-sound processing technique, Directional Audio Coding (DirAC). It is shown that the method provides a reliable direction estimation at the entire audio frequency range, whereas the traditional method employing the pressure gradients produces correct estimation in a limited frequency window only.


  Speech Transcript

|

  Slides

Enlarge the slide | Show all slides in a pop-up window

0:00:16

  1. slide

0:00:30

  2. slide

0:01:15

  3. slide

0:02:43

  4. slide

0:03:53

  5. slide

0:04:53

  6. slide

0:06:03

  7. slide

0:07:03

  8. slide

0:08:26

  9. slide

0:09:53

 10. slide

0:11:29

 11. slide

0:12:23

 12. slide

0:14:09

 13. slide

  Comments

Please sign in to post your comment!

  Lecture Information

Recorded: 2011-05-27 13:45 - 14:05, Club D
Added: 19. 6. 2011 23:56
Number of views: 36
Video resolution: 1024x576 px, 512x288 px
Video length: 0:16:12
Audio track: MP3 [5.46 MB], 0:16:12