Abstract: A microphone apparatus for a video camera having a zoom lens, comprising: a superdirectional microphone fro generating a superdirectional microphone signal D; a stereo microphone for generating stereo microphone signals L and R; a zoom position sensor for generating a zoom position signal; first and second signal means for generating control signals Vc1 and Vc2 which can be changed according to the zoom position signal; a first amplifier for generating a first amplified signal K1.multidot.D (K1 is a value corresponding to Vc1); a second amplifier for generating a second amplified signal K2.multidot.L (K2 is a value corresponding to Vc2); a third amplifier for generating a third amplified signal K2.multidot.R; a first adder for generating a first sum signal (k1.multidot.D+K2.multidot.L); and a second adding means for generating a second sum signal (k1.multidot.D+K2.multidot.R). The directivity can be varied in accordance with the control of the zoom lens to suitably match images and sounds.

Abstract: A dust-free garment including: a garment body having garment opening portions opening to the outside; an air passage system, attached to the garment body and having an outlet adapted to communicate to a dust collector for exhausting air therein to the dust collector to filter air; and an air entrance mechanism located in the vicinity of at least one of the garment opening portions and communicated to the air passage system for entering air into the air passage system.

Abstract: An open-cycle type air conditioner includes three major passges; a room air passage defined between a room air inlet and a room air outlet; an outside air passage defined between an outside air inlet and an outside air outlet; and a regenerative air passage defined between a regenerative air inlet and a regenerative air outlet. A room air blower unit is disposed in the room air passage face to face with the room air inlet. A rotary latent heat exchanger which preferably comprises polyester un-woven fiber impregnated with lithium chloride extends over the room air passage and the regenerative air passage with its side walls in a horizontal direction. The rotary latent heat exchanger is located on the downflow side of the regenerative inlet.