2010-10-14 04:56:42
By Jason Palmer Science and technology reporter, BBC News
Empty table overlooking vineyard This might be the best place for the tastiest
meal
The level of background noise affects both the intensity of flavour and the
perceived crunchiness of foods, researchers have found.
Blindfolded diners assessed the sweetness, saltiness, and crunchiness, as well
as overall flavour, of foods as they were played white noise.
While louder noise reduced the reported sweetness or saltiness, it increased
the measure of crunch.
The research is reported in the journal Food Quality and Preference.
It may go some way to explaining why airline food is notoriously bland - a
phenomenon that drives airline catering companies to heavily season their
foods.
"There's a general opinion that aeroplane foods aren't fantastic," said Andy
Woods, a researcher from Unilever's laboratories and the University of
Manchester.
"I'm sure airlines do their best - and given that, we wondered if there are
other reasons why the food would not be so good. One thought was perhaps the
background noise has some impact," he told BBC News.
"Nasa gives their space explorers very strong-tasting foods, because for some
reason thay can't taste food that strongly - again, perhaps it's the background
noise.
"There was no previous research on this, so we went about seeing if the hunch
was correct."
Tasteful
In a comparatively small study, 48 participants were fed sweet foods such as
biscuits or salty ones such as crisps, while listening to silence or noise
through headphones.
Meanwhile they rated the intensity of the flavours and of their liking.
In noisier settings, foods were rated less salty or sweet than they were in the
absence of background noise, but were rated to be more crunchy.
"The evidence points to this effect being down to where your attention lies -
if the background noise is loud it might draw your attention to that, away from
the food," Dr Woods said.
Also in the group's findings there is the suggestion that the overall
satisfaction with the food aligned with the degree to which diners liked what
they were hearing - a finding the researchers are pursuing in further
experiments.