Loud speaking model.

Velocity [m/s] profile used as boundary condition in Human 1 from 0.0 to 100.0 seconds, spaced every 0.01 seconds. (XLSX)</p

Breathing flowrate model.

Flow rate [L/min] used for respiration boundary condition in Human 2, from 0.0 to 100.0 seconds, spaced every 0.01 seconds, along with the metabolic parameters used to calculate it based on the model proposed by Gupta et al. (29). (XLSX)</p

Design of analyzed domain with respiratory tract divisions explained.

Design of analyzed domain with respiratory tract divisions explained.</p

Fig 2 -

BCM mesh design (a) between Human 1 and Human 2, (b) near the mouth of Human 1, (c) around the nose of Human 2, (d) inside the nasal cavity and vestibule and (e) inside the bronchial tubes.</p

Instantaneous distributions of inhaled and exhaled air by Human 2 at t = 13.0 s and t = 15.0 s for C1.

Instantaneous distributions of inhaled and exhaled air by Human 2 at t = 13.0 s and t = 15.0 s for C1.</p

Particle vs time (BZ).

Number of particles counted in the breathing zone from 39.0 to 49.0 seconds, as explained in section 3.4. (XLSX)</p

Particle and mass rate in the breathing zone and deposited in the respiratory tract.

Particle and mass rate in the breathing zone and deposited in the respiratory tract.</p

Instantaneous states of particle dispersion at t = 19.0 s and t = 49.0 s for all cases with particles colored according to their diameter.

Instantaneous states of particle dispersion at t = 19.0 s and t = 49.0 s for all cases with particles colored according to their diameter.</p

Evolution of particle deposition in the nasal vestibule and nasal cavity and depiction of total number of particles deposited in the respiratory tract.

Evolution of particle deposition in the nasal vestibule and nasal cavity and depiction of total number of particles deposited in the respiratory tract.</p

3D depiction of speech jet generated by Human 1 over one cycle and inhaled/exhaled air by Human 2 for all cases.

3D depiction of speech jet generated by Human 1 over one cycle and inhaled/exhaled air by Human 2 for all cases.</p