Abstract: A microphone mounting structure for mounting a microphone to a respiratory mask through a hole in the respiratory mask. The microphone mounting structure is thus able to convert a conventional respiratory mask into a sound amplifying respiratory mask. The microphone mounting structure comprises a tubular plug, a sleeve, and a tubular locking mechanism. The tubular plug has a closed end, an open end and a central portion disposed therebetween. The closed end of the tubular plug has a larger outer diameter than an outer diameter of the central portion. The open end has a plurality of resilient fingers defined by slots in the open end, the resilient fingers having finger tips which project radially outwardly with respect to the tubular plug. The sleeve receives the microphone and is dimensioned so as to fit coaxially inside the tubular plug.