A cassette assembly and a method of manufacturing fluorescent lamps using the cassette assembly are provided. The exciting sound wave is used to modulate the primary tone of the noise and, therefore, distribute sound energy of the noise from the primary tone to a broad range of side bands so that the amplitude of the primary tone of the noise is reduced. 5 mg per gram of the composition. A retainer is adapted to retain an oxygen supply tube on the airway adapter body in such an attitude that an oxygen gas supplied from prongs of the oxygen supply tube is not directly injected into the nostrils. A moisture-proof film coats at least part of the surface of the resin substrate in which no lead-out electrode is formed. The inner driving coil wiring extends on the outer movable plate so as to avoid a magnetic field generated by the outer movable plate driving magnetic field generator.