People　constantly　move　their　heads　during　conversation,　as　such　movement　is　an　important　non-verbal　mode　of　communication.　Head　movement　alters　the　direction　of　people＇s　expired　air　flow,　therefore　affecting　their　conver-sational　partners＇　level　of　exposure.　Nevertheless,　there　is　a　lack　of　understanding　of　the　mechanism　whereby　head　movement　affects　people＇s　exposure.　In　this　study,　a　dynamic　meshing　method　in　computational　fluid　dynamics　was　used　to　simulate　the　head　movement　of　a　human-shaped　thermal　manikin.　Droplets　were　released　during　the　oral　expiration　periods　of　the　source　manikin,　during　which　it　was　either　motionless,　was　shaking　its　head　or　was　nodding　its　head,　while　the　head　of　a　face-to-face　target　manikin　remained　motionless.　The　results　indicate　that　the　target　manikin　had　a　high　level　of　exposure　to　respiratory　droplets　when　the　source　manikin　was　motionless,　whereas　the　target　manikin＇s　level　of　exposure　was　significantly　reduced　when　the　source　manikin　was　shaking　or　nodding　its　head.　The　source　manikin　had　the　highest　level　of　self-exposure　when　it　was　nodding　its　head　and　the　lowest　level　of　self-exposure　when　its　head　was　motionless.　People＇s　level　of　exposure　during　close　contact　is　highly　variable,　highlighting　the　need　for　further　investigations　in　more　realistic　conversational　scenarios.