| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Directivity of Spherical Polyhedron Sound Source Used in Near-Field HRTF Measurements |
| YU Guang-Zheng1**, XIE Bo-Sun1,2, RAO Dan1
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1Acoustic Laboratory, Department of Physics, School of Science, South China University of Technology, Guangzhou 510641
2State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641
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| Cite this article: |
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YU Guang-Zheng, XIE Bo-Sun, RAO Dan 2010 Chin. Phys. Lett. 27 124302 |
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Abstract The omnidirectional character is one of important requirements for the sound source used in near-field head-related transfer function (HRTF) measurements. Based on the analysis on the radiation sound pressure and directivity character of various spherical polyhedron sound sources, a spherical dodecahedral sound source with radius of 0.035 m is proposed and manufactured. Theoretical and measured results indicate that the sound source is approximately omnidirectional below the frequency of 8 kHz. In addition, the sound source has reasonable magnitude response from 350 Hz to 20 kHz and linear phase characteristics. Therefore, it is suitable for the near-field HRTF measurements.
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| Keywords:
43.60.Gk
43.66.Qp
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Received: 02 August 2010
Published: 23 November 2010
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| PACS: |
43.60.Gk
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(Space-time signal processing, other than matched field processing)
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43.66.Qp
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(Localization of sound sources)
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