Aircraft engine noises have been shown to impair taste reception by up to 30 % . However umami , the so-called `` fifth taste , '' may be immune to this effect . Umami has been called `` the fifth taste , '' after salty , bitter , sweet and sour , and has been likened to a `` savory '' flavor . This is because it's not a smell but rather an aroma that can only be detected when there are no other sounds in the room ( e.g. ).
Aircraft engine noises have been shown to impair taste reception by up to 30 % . However umami , the so-called `` fifth taste , '' may be immune to this effect . This is because it's not a smell but rather an aroma that can only be detected when there are no other sounds in the room ( e.g. ).