Apparatus and instruments, all for industrial use and utilizing infrasonic and/or low frequency soundwaves, in particular for the removal of soot and other such matter and suitable for use in large industrial, utility and process boilers, economizers, preheaters and the like, adapted to be installed in heating plants, electricity plants and steam generating plants, or adapted for marine applications aboard ships

A range of high powered industrial low frequency sound generators producing pressure pulses at a frequency of approx. 20 Hertz for cleaning dry dusty deposits in boilers, airheaters, precipitators, baghouses, economisers and other such enclosed compartments