Abstract: A noise reduction appliance for connection to, or integrally formed with, an outlet end of a blast nozzle, the blast nozzle having an outlet with a nozzle outlet diameter, the noise reduction appliance comprising an appliance body with a conduit formed therethrough, the conduit extending from an inlet opening of the appliance body to an outlet opening of the appliance body, the inlet opening of the appliance body having an inlet opening diameter substantially equal to the nozzle outlet diameter; and the outlet opening of the appliance body having an outlet opening diameter greater than the inlet opening diameter; wherein a radius of the conduit monotonically increases with distance, from the inlet opening to the outlet opening.

Abstract: A nozzle arrangement for use in expelling pressurized fluid includes a dead man control. The dead man control has a manually operable control part movable between a non-operating position, which prevents operation of the nozzle arrangement, and an operating position, and biased towards the non-operating position. The manually operable control part is pivotably coupled relative to a nozzle holder of the nozzle arrangement, which extends away from the pivotal coupling substantially towards a distal end of a nozzle part of the nozzle arrangement. The manually operable control part includes a handle part which in the operating position is substantially against and aligned with the nozzle part.