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Courses provided by Vox Institute

The Power of Voice in speech communication

Enrol in this course (two different locations):
residential (in a Castle) (see flyer) or non-residential in Geneva (see flyer)


  1. To identify personal strengths and weaknesses in speech communication.
  2. To choose the speaking style that enhances credibility and persuasiveness.
  3. To master the emotional dimensions of speech communication.
  4. To control one’s nonverbal behaviour (facial expressions, gestures, posture).


  • The role of verbal, vocal and nonverbal behaviour in speech communication.
  • Three main vocal skills: chunking, emphasis, intonation.
  • Vocal style in public speaking and in face-to-face interaction.
  • Verbal aspects: vocabulary (emotional semantic networks); choice of argumentation strategy (blends of rational and emotional strategies).
  • Nonverbal behaviour (facial expressions, gestures, gaze, posture) and their strategic usage in speech communication.
  • Congruence between verbal content and nonverbal behaviour.
  • Oratory: most efficient rhetorical figures in speaking and writing.


  • Acoustic analysis of the participants’ voices: vocal "fingerprint" graph
  • Illustration of various models
  • Assessment of the impact of voice on audience,
  • Practising speaking styles with the help of audio recordings.

The graph below illustrates a voice profile as measured by a computerised acoustic analysis program, where various features of the speaker's voice are compared with a model and presented as % of the reference values.

Voice Profile
Voice Profile