Using acoustic imaging, helioseismologists can construct images of the intensity, at different depths within the sun, of the acoustic waves associated with sunspots, from which one can clearly see how sunspots weaken with depth.
利用聲波成像法分析，可以獲得黑子區在太陽內部不同深度的聲波強度圖，明顯可見黑子現象隨著深度而減弱。