speech

• human voice

  generated by a controlled flow of air through the vocal tract
• Bernoulli's law


  if fluid velocity increases, fluid pressure decreases
• laryngitis 


  vocal cords swollen due to inflammation or irritation, less willing to vibrate, meaning loss of voice
• node


  when a wave has zero amplitude
• anti-node


  where it has maximal displacement
• fricative sounds


  created by turbulent airflow at the lips and teeth
• phonated sounds (a,e,i,o,u)

  sounds produced through controlled airflow