Effective acoustic centre

urn:mrn:iala:dic:3-1-0125

Effective acoustic centre (of a sound source)

The point from which the spherical waves as observed at remote points appear to diverge.

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