Analysis of information sources in references of the Wikipedia article "Allophone" in English language version.
...An allophone is the set of phones contained in the intersection of a maximal set of phonetically similar phones and a primary phonetically related set of phones....
... The ordinary native speaker is, in fact, often unaware of the allophonic variations of his phonemes ...
...always found that native speakers are clearly aware of the phonemes of their language but are both unaware of and even shocked by the plethora of allophones and the minutiae needed to distinguish between them....
...When the occurrence of one allophone is predictable when compared to the other, as in this case, we call this complementary distribution. Complementary distribution means that the allophones are 'distributed' as complements....
