ear simulations, <code>alpha</code> and <code>p</code> correspond to the absorption coefficient and pressure amplitude at each frequency harmonic.</p>

<p>For a linear simulation, the pressure amplitude <code>p</code> can be approximated by recording the maximum pressure once the simulation has reached steady state, i.e., by setting <code>sensor.record = {'p_max_all'}</code>, and <code>sensor.record_start_index</code> to a time step after the simulation has reached steady state. A more accurate estimate of 