Shinkai: Hear No Evil Technique

Similar to it's cousin, the See No Evil Technique, the use of this technique allows one to temporarily hinder a foe's senses; this variant focuses on their hearing. By tapping the victim's forehead with a finger once, the user places a seal on them that causes the unfortunate foe's ears to involuntarily block out all sound. The seal fills this silence with a constant high-pitched noise, which is loud enough to cause significant discomfort to the victim while keeping them oblivious to any other nearby sounds.