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received pronunciation

a standard of british pronunciation used by well-educated british people. not a geographically based accent, connected with the speaker's education level or social status

general american

the standard way in which well-educated people in us speak or pronounce word, that does not sound as though it comes from any particular region

IPA - international phonetics alphabet

a set of symbols which represent the sounds of human languages

phonetics

practical study of sounds of human languages