Acoustic impedance

3-1-120

(at a surface)

The complex quotient of the sound pressure and the volume velocity through the surface.

Note: This definition is valid only for sinusoidal vibrations in the steady state.

Reference: I.E.C. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English

charge current

Intensity

Illuminance

Energy

Contrast

Celsius (previously Centigrade)

Capacitance

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM