synaesthesia

aistien sekoittuminen, synestesia puhekieltä A neurological or psychological phenomenon whereby a particular sensory stimulus triggers a second kind of sensation.
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Into her darkness, a churning synaesthesia, where her pain was the taste of old iron, scent of melon, wings of a moth brushing her cheek.

For example, I myself have a type of synaesthesia: The sounds of musical instruments will sometimes make me see colors, about a yard in front of me, each color specific and consistent with the particular instrument playing.

Synaesthesia can occur particularly powerfully during mescalin and LSD intoxication, and is often given mystical significance.

On a phonemic level, phenomena of synesthesia have often been described and studied. Practically all children and a good many adults—though for the most part adults will deny it—spontaneously associate sounds, whether phonemes or the timbre of musical instruments, with colors and forms.

For one of the enigmatic features of synaesthesia is that, within a given cultural group, the kinds of associations made by specific subjects occur according to statistically verifiable recurring patterns. As Jakobson explains, ‘When we ask whether /i/ or /u/ is darker, testing such phonic oppositions as grave vs. acute, some of the subjects may respond that this question makes no sense to them, but hardly one will respond that /i/ is the darker of the two’ (1981:44).

Linking moods with colours is one example of synaesthesia.

(..)it may be stated that the concept of synaesthesia is instrumental for understanding music videos, since videos are based on the soundtrack′s visual associations.28