The noise level of Airbus A320 and Boeing 737-800 type aircraft, which are widely used in the medium category all over the world, is around 93-94 decibels.

The Airbus A320 is considered one of the quieter modern narrow-body aircraft, with an internal cabin noise level typically ranging from 68 to 78 decibels (dB). During the cruise phase of flight, the noise level in the cabin—specifically in the front or middle sections—hovers around 70 dB, which is roughly equivalent to the volume of a standard conversation or a running vacuum cleaner. During the most intense phase, takeoff, the external noise of the A320's engines can exceed 140 dB near the tarmac, but the soundproofing of the fuselage keeps the internal levels manageable for passengers. In the cockpit, pilots often measure levels between 72 dB and 76 dB during the climb. Interestingly, the newer A320neo (New Engine Option) is approximately 15% quieter than the older "ceo" models, producing a noticeably higher-pitched but lower-volume hum. While sustained noise at these levels can still lead to "travel fatigue," the A320 remains a preferred choice for short-to-medium haul routes because its advanced "high-bypass" turbofan engines significantly reduce the "roar" associated with older jets.