aspcol.soundfieldestimation.measurement_conj_omni

aspcol.soundfieldestimation.measurement_conj_omni(pos, exp_center, max_order, wave_num)

Returns the adjoint measurement operator Xi^H

Can be applied as shd_coeffs(pos) = Xi^H @ p where p is complex sound pressure at the measurement points

Parameters:

  • pos (ndarray of shape (num_pos, 3)) – positions of the measurement points where the sound pressure was measured

  • exp_center (ndarray of shape (1, 3)) – expansion center of the spherical harmonics

  • int (max_order =) – maximum order of the spherical harmonics that is output by the operator

  • wave_num (ndarray of shape (num_freqs,)) – wavenumber, defined as w / c where w is the angular frequency and c is the speed of sound.

Returns:

operator – adjoint of the measurement operator

Return type:

ndarray of shape (num_freqs, num_coeffs, num_pos)