Abstract: The present invention provides a multi-functional masking assembly having a humidity adjusting function, and having a sheet module provided on the inner side surface of the mask worn to cover the nose and the mouth of the face, wherein the sheet module is located on the cheek parts of the face, and water is supplied to the sheet module so as to supply humidity to the nose and the mouth of the face and to adjust humidity around the nose and the mouth while the mask is worn, thereby: preventing a cold, dryness due to the air during air conditioning, and inhalation of polluted air, yellow dust, fine dust, and the like caused by air pollution while increasing respiratory health; and enabling people of all ages and genders to easily use the mask.

Abstract: A rotating body installed between a motor fixed to the top of a fixed plate and a bent section at one end of a column. Blades are formed on the upper and lower ends of the outer peripheral surface of the rotating body, wherein a spongy body for humidification is located at each of the blades, a connecting body formed of a permanent magnet for coupling is coupled to one surface of the blade, and a cartridge having multiple fine holes formed there through is coupled to the other surface of the blade. The cartridge may be supplied with fluid through an end portion of a hose. The retained water is sprayed through the fine holes or moisture in the air is absorbed into the spongy body by replacing the spongy body accommodated in the cartridge with a dehumidifying agent according to necessity and rotating the motor.

Abstract: A speaker system designed to use wider resonant sound waves by two conventional speakers which are symmetrically and oppositely disposed to face one another along a co-axis on which both axes of the cone paper vibrator of the speakers are aligned. A sponge like sound wave absorbing material with cone-shaped recesses may be disposed in between the speaker and spherical speaker case.

Abstract: An air breezing pump designed to supply air for biasing the vibrator of a speaker by providing a conventional speaker with an air inlet valve and an air outlet valve on its vibrating medium, and thereby excluding existing ducts from the enclosure of the speaker assembly.

Abstract: A low frequency transformer for an audio system has a core, a primary winding, a secondary winding, insulation between the primary and secondary windings, a tertiary winding, and insulation between the secondary and tertiary windings. One end of the tertiary winding is embedded in the insulation between the secondary and tertiary windings, and the other end is grounded. With a tertiary winding arranged and connected in this fashion, the effects of external interference signals are substantially eliminated, and the output of the transformer is improved, i.e., it has less waveshape and frequency distortion. Preferably, the primary and tertiary windings are wound around the core in the same direction while the secondary winding is wound around the core in the opposite direction.