The blandness of airline food has an explanation.
Research shows that people lose their sense of taste when listening to the sort of ‘white noise’ heard inside an aircraft’s cabin.

White noise consists of a random collection of sounds at different frequencies and scientists have demonstrated that it is capable of diminishing the taste of salt.
At low-pressure conditions, higher taste and odour thresholds of flavourings are generally observed.
At 30.000 feet the cabin humidity drops by 15%, and the lowered air pressure forces bodily fluids upwards. With less humidity, people have less moisture in their throat, which slows the transport of odours to the brains smell and taste receptors. That means that if a meal should taste the same up in the air, as on ground it needs 30% of extra salt.

I have created a series of scanning electron micrographs of dissolved salt that appears to be a landscape viewed from an aeroplane in flight.

Winner of the British Institution Award at the Royal Academy of Arts Summer Exhibition 2013

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The length of the final print symbolises the 30% extra salt needed for food to taste the same in the air as on the ground.