Acoustic Glossary


J : Sound and Vibration Definitions, Terms, Units, Measurements ..

Jerk a vector quantity that specifies time rate of change of acceleration - units m/s3

Joule : J the derived SI unit of Work or Energy.

A Joule is the work done by a Force of 1 Newton acting through a distance of one metre.
Joule = N·m = Kg·m2/s2 = W·s = Pa·m3 = 107 ergs = C·V

where kg is the kilogram, m is the metre, s is the second, N is the newton, Pa is the pascal, W is the watt, C is the coulomb, and V is the volt.

joule per cubic metre : J/m3 : see Energy Density

joule per kilogram : J/kg : see Specific Energy

joule per second, J/s : see Sound Power