Airborne sound is sound waves , which extends over the air spread . In physiology one speaks of air conduction .
In contrast to structure-borne sound, air- borne sound consists of pure longitudinal waves , since fluids (gases) do not transmit any shear forces .
In a narrower sense, the term “airborne sound” is used for the frequency range of the human hearing , which starts at around 16 Hz and ends at a maximum of 20 kHz, depending on age.
A distinction is made with regard to the desirability between useful sound and interference sound , which can be reduced with sound insulation measures .
- University of Duisburg: Airborne noise protection