aspcol.sphericalharmonics.directivity_omni

aspcol.sphericalharmonics.directivity_omni(max_order=0)

Harmonic coefficients of an omnidirectional directivity function

Parameters:

max_order (int) – maximum order of the spherical harmonics. If set higher than 0, the coefficients of the higher orders will be zero.

Returns:

dir_coeffs – coefficients of the directivity function

Return type:

ndarray of shape (1, num_coeffs)

References

[uenoSound2018] N. Ueno, S. Koyama, and H. Saruwatari, “Sound field recording using distributed microphones based on harmonic analysis of infinite order,” IEEE Signal Process. Lett., vol. 25, no. 1, pp. 135–139, Jan. 2018, doi: 10.1109/LSP.2017.2775242. [brunnstromBayesianSubmitted] J. Brunnström, M. B. Møller, and M. Moonen, “Bayesian sound field estimation using moving microphones,” IEEE Open Journal of Signal Processing, submitted.

Notes

The directivity coefficients are defined in more detail in the supplementary notes of [uenoSound2018] and in [brunnstromBayesianSubmitted]