Hypersonic Screech

Overview
By extension of his mastery of his Zanpakutō, N is able to channel his power through his body and fire potent sonic shockwaves from his mouth. These are used to catch his opponents off guard while he masquerades as a human in his exile. By focusing his energy in his vocal cords he is able to modulate the pitch of his pulses and use his pulses to scramble his opponents auditory senses. He has retained this as a special human, despite not having his full powers.

Wall of Sound and Sonic Doom
As an application of his powers and speed, N is able to create a wall of sound. By releasing well placed burst of sonic energy, he is able to block offensive attacks as well as form a cage to trap those within an endless bombardment of sonic attacks. The advanced version of this technique is known as his Sonic Doom.