  A learning path is proposed starting from the characterization of a sound
wave, showing how human beings emit articulate sounds in the language,
introducing psychoacoustics, i.e. how the sound interacts with ears and it is
transduced into an electrical signal for transmission to the brain. What is
perceived as noise is presented and the concept is extended to physical
measurements. The interdisciplinary teaching process is focused on active
learning through activities at school and outside performed with an open source
software which allows to record sounds and analyze spectral components.
