Individual #acoustics__acoustic  the study of the physical properties of sound
  >part of:  #physics__physic__physical_science__natural_philosophy__naturalphilosophy  the science of matter and energy and their interactions
  >part:  #harmonics__harmonic  the study of musical sound
  >part:  #phonetics__phonetic  the branch of acoustics concerned with speech processes including its production and perception and acoustic analysis

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