Aerosol containment system

In an ultrasonic apparatus having a signal generator for generating high frequency sound waves to a convertor which transforms electrical energy into mechanical energy in the form of oscillations to a horn having a probe immersed in a sample disposed in a sample holder, the combination comprising:

• a cabinet enclosing said convertor, said horn and said probe, said cabinet including an inner chamber lined with sound absorbing foam and having a front observation panel comprised of a layered plexiglass assembly for abatement of noise generated by the oscillation of said probe in said sample.

In an ultrasonic apparatus for generating high frequency sound waves to a convertor which transforms electrical energy into mechanical energy in the form of oscillations to a horn having a probe immersed in a sample disposed in a sample container, the improvement comprising:

• a shielding arrangement having one end sealed against said horn, and having another end sealed against and in sliding relationship with said sample container, said another end formed with a passageway having a longitudinal axis coincidental with the longitudinal axes of said sample container and said probe such that said another end defines a self centering device for said sample container as it slides in said another end.