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6/05/2000 · Abstract. Objective: To investigate patients' agendas before consultation and to assess which aspects of agendas are voiced in the consultation and the effects of unvoiced … Voiced and unvoiced sounds pdf Westbrook In American English, we have voiced and unvoiced sounds. All vowels are voiced. All diphthongs are voiced. Consonants can be either voiced or unvoiced. Unvoiced consonants are made just with air, no, uhh, sound from the vocal cords. For example, hh, sh, tt, pp. Voiced consonants do have voice in them, uhh, like: mm, bb, zh.