Abstract: An eardrum pressure equalizer for the treatment of middle ear impairment having a source of compressed air for supplying dry room temperature air at a pressure of an order of magnitude of aproximately 3.5 kgs. per square centimeter. The air is supplied to a storage tank and from there, by way of a second storage receptacle to a disposable applicator tip adapted to be inserted into a nasal passage. The apparatus includes electronic circuitry having a microprocessor for accurately controlling the pressure of the air in the storage tank and for permitting the apparatus to be selectively used in either a continuous flow or an interrupted flow mode while allowing the pressure to be maintained at any chosen value, with a resolution factor of approximately 1/10 kg. per square centimeter.