Zurich - The Airbus A220 is often praised as one of the quietest airliners in the world, but the Kloten residents around Zurich Airport think differently. According to them, the aircraft sounds like a horny killer whale during landing.

Lufthansa Group subsidiary SWISS International Airlines is based at Zurich-Kloten Airport. The carrier is the largest operator of the Airbus A220 in the world with 25 aircraft.

The airline had promised Kloten residents that the Airbus A220 (formerly Bombardier CSeries) would be 50 percent quieter than older aircraft of similar size.

But residents complain, however, that during the landings of the A220s they hear a strange howling noise coming from the engines. This sound is described as the call of an Orca (Killer Whale) while it is looking for mating.

Both SWISS and Airbus confirm the existence of the problem. The noise would occur during the movement of the throttle at low speed. Both companies are working with engine manufacturer Pratt & Whitney on a quick solution so that the A220 can prevent its reputation as a whisper jet.

Here is how a killer whale sounds: