Common use of Cabin Clause in Contracts

Cabin. At a pressure altitude of ** and a true Mach number of ** straight and level flight in still air under ISA conditions, the guaranteed A-weighted Sound Pressure Level (SPL) and the Speech Interference Level (SIL) shall be as follows: Guarantee SPL [dB(A)] ** SIL [dB] ** Noise levels shall be measured at a height of ** above the passenger compartment floor on the aisle center lines in the passenger seated area.

Cabin. At a pressure altitude of ** and a true Mach number of ** in straight and level flight in still air under ISA conditions, the guaranteed A-weighted Sound Pressure Level (SPL) and the Speech Interference Level (SIL) shall be as follows: Guarantee SPL [dB(A)] ** SIL [dB] ** Noise levels shall be measured at a height of ** above the passenger compartment floor on the aisle center lines in the passenger seated area.