The Reciprocal Substitution Method for Measuring the Transmission of Structure Borne Sound

In connection with much noise-producing equipment.such as domestic appliances, structure-borne sound transmission is more important than air-borne sound transmission.Methods for describing or measuring sound emission and transmission, however, only deal with air-borne sound.This may be due to the more complicated way in which the structure is excited and vibrations are transmitted.In 1 results of research to find an appropriate description of the structure-borne sound strength are presented.It was concluded that the (A-weighted) equivalent force proved to be a suitable source description.Knowing the source strength of the equipment.the sound pressure level in a receiving room can be calculated, if the transmission is known.This paper will deal with the measurement of the structure-borne sound transmission, and in particular with the use of the reciprocal substitution method.