Paragraph 4 Aircraft NoiseI1 Scotland The supplementary noise indicators in relation to aircraft noise are–(a)LAeq,16h;(b)Lday; and(c)Levening. Annotations Commencement I1 Sch. 3 para. 4 in force at 5.10.2006, see reg. 1(1) ← Paragraph 3 Paragraph 4 Paragraph 5 →