Q : Sound and Vibration Definitions, Terms, Units, Measurements ..
Q : Exchange Rate
International System of Quantities : ISQ IEC Definition,
system of quantities based on the seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
● Note 1 : the International System of Quantities is published in the International Standard ISO/IEC 80000, Quantities and units.
● Note 2 : the International System of Units (SI) is based on the ISQ.
Quotient ratio of two numbers or quantities to be divided, for example a measured Sound Pressure to the Reference Sound Pressure.