Zhang Yanhang occasionally engaged in other activities, slightly wasting some time, so it took him an extra half hour to master the Three Tier Spell Silent Field by 3:30 PM. Had he stayed at home and focused solely on learning, he would have likely mastered it by 3:00 PM.
Compared with the Zero Ring Illusion Sound Barrier, a mere trick that only possessed sound isolation capabilities, the Three Tier Spell Silent Field was a legitimate spell that far surpassed the Soundproof Barrier in both functionality and coverage area.
First and foremost was the essential aspect of silence. Unlike the original Soundproof Barrier, which only simply isolated the interior from the exterior, the Silent Field also provided some defensive effects because it could completely eliminate any sounds produced within its covered area.
