Abstract: A cerumen protection plug for a hearing device. The cerumen protection plug prevents cerumen from passing along a sound conduit in the hearing device and blocking sound output from a receiver in the hearing device. The cerumen protection plug includes a circular plug containing a cerumen barrier. A positioning handle allows the cerumen barrier to be positioned along the sound conduit, where it prevents cerumen that has entered the sound conduit from traveling along the sound conduit to the receiver or an output port of the receiver.

Abstract: A tool for replacing a cerumen filter in a sound conduit of a hearing aid. The tool is designed to position a cerumen filter along the sound conduit and to couple with and remove a cerumen filter that has been positioned along the sound conduit. The tool comprises an insertion tip and an removal tip, both configured to fit inside the sound conduit and to couple or engage with an engagement body extending centrally from the cerumen filter. The tool may be in the form of a stylus with the insertion tip on one and the removing tip on the other end. The tool may also be in the form of a disc dispenser with a plurality of insertion and removal tips attached to the dispenser and accessible for use by rotating plates making up the disc dispenser.

Abstract: A cerumen protection plug for a hearing device. The cerumen protection plug prevents cerumen from passing along a sound conduit in the hearing device and blocking sound output from a receiver in the hearing device. The cerumen protection plug includes a circular plug containing a cerumen barrier. A positioning handle allows the cerumen barrier to be positioned along the sound conduit, where it prevents cerumen that has entered the sound conduit from traveling along the sound conduit to the receiver or an output port of the receiver.

Abstract: A tool for replacing a cerumen filter in a sound conduit of a hearing aid. The tool is designed to position a cerumen filter along the sound conduit and to couple with and remove a cerumen filter that has been positioned along the sound conduit. The tool comprises an insertion tip and an removal tip, both configured to fit inside the sound conduit and to couple or engage with an engagement body extending centrally from the cerumen filter. The tool may be in the form of a stylus with the insertion tip on one and the removing tip on the other end. The tool may also be in the form of a disc dispenser with a plurality of insertion and removal tips attached to the dispenser and accessible for use by rotating plates making up the disc dispenser.

Abstract: Formation of nitrogen oxides and/or soot is obviated by mixing recycled combustion gas with incoming comburant supplied to a burner via a distribution opening and controlling the mass flow rate of combustion gas being recycled with respect to the mass flow rate necessary for the gaseous comburant, the mixture being passed to the burner as a turbulent flow in which the ratio between the kinetic momentum flux of the mixture and the product of the radius of the said distribution opening times the axial movement quantity flux of the mixture has a value at least sufficient so that the said turbulent flow produces a recirculation of the said mixture within the combustion chamber in the form of a toroidal vortex.