Abstract
It is often enough to localize environmental sources of noise from different directions in a plane.
This can be accomplished with a circular microphone array, which can be designed to have practically the same resolution over 360. The microphones can be suspended in free space or they can be mounted on a solid cylinder. This investigation examines and compares two techniques based on such arrays, the classical delay-and-sum beamforming and an alternative method called circular harmonics beamforming. The latter is based on decomposing the sound field into a series of circular harmonics. The performance of the two signal processing techniques is examined using computer simulations, and the results are validated experimentally.
| Original language | English |
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| Title of host publication | Proceedings of Inter-Noise 2010 |
| Publication date | 2010 |
| Publication status | Published - 2010 |
| Event | 39th International Congress and Exposition on Noise Control Engineering - Lisbon, Portugal Duration: 15 Jun 2010 → 16 Jun 2010 Conference number: 39 http://www.spacustica.pt/internoise2010/ |
Conference
| Conference | 39th International Congress and Exposition on Noise Control Engineering |
|---|---|
| Number | 39 |
| Country/Territory | Portugal |
| City | Lisbon |
| Period | 15/06/2010 → 16/06/2010 |
| Internet address |
Keywords
- Delay-and-sum
- Environmental noise
- Circular harmonics
- Circular arrays
- Beamforming