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Guarantee

Passenger seated area SPL[dB(A)] **

SIL [dB] **

4.2.2 Interior Noise in Flight

4.2.2.1 Cockpit

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 the Captain's and First Officer's seat position at head level with normal cockpit air conditioning and ventilation in

operation.

4.2.2.2 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

Front 40% of passenger seated area SPL [dB(A)] **

SIL [dB] **

Remaining 60 % of passenger seated area 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.

** Confidential Treatment Requested.

USA — Amended & Restated Airbus A320 Family Purchase Agreement LA 8E-1 — 9 of 14

EXECUTION PRIVILEGED AND CONFIDENTIAL