Abstract: Provided is a microphone array device that is excellent in portability and suppresses sound wave interference. A microphone array device 1 according to the present invention includes a plurality of microphones and a housing 10 that accommodates the microphones. The housing includes first, second, third and fourth holes opened to an end surface of the housing in +X-axis, ?X-axis, +Y-axis and ?Y-axis directions, respectively. A first, second, third and fourth microphones are mounted in the first, second, third and fourth holes, respectively, and the holes are disposed on an XY virtual plane. An X-axis length Lx between an opening end of the first hole and an opening end of the second hole is shorter than a Y-axis length Ly between an opening end of the third hole and an opening end of the fourth hole and/or a Z-axis length Lz of the housing.

Abstract: A fine bubble-containing liquid generating apparatus includes a generator including a mixing nozzle for leading in gas and pressurized liquid and a fine-bubble generating nozzle for discharging liquid that contains fine bubbles of the led-in gas, a circulation passage for returning liquid discharged from the fine-bubble generating nozzle to the mixing nozzle in a state in which the liquid is isolated from outside air, an extraction part for extracting, as a fine-bubble containing liquid, part of liquid circulating through the generator and the circulation passage, and a replenisher for replenishing the circulation passage with liquid to maintain the amount of liquid circulating through the generator and the circulation passage. With this configuration, it is possible to continuously generate a fine-bubble containing liquid that contains a high density of fine bubbles.

Abstract: A fine bubble-containing liquid generating apparatus includes a generator including a mixing nozzle for leading in gas and pressurized liquid and a fine-bubble generating nozzle for discharging liquid that contains fine bubbles of the led-in gas, a circulation passage for returning liquid discharged from the fine-bubble generating nozzle to the mixing nozzle in a state in which the liquid is isolated from outside air, an extraction part for extracting, as a fine-bubble containing liquid, part of liquid circulating through the generator and the circulation passage, and a replenisher for replenishing the circulation passage with liquid to maintain the amount of liquid circulating through the generator and the circulation passage. With this configuration, it is possible to continuously generate a fine-bubble containing liquid that contains a high density of fine bubbles.

Abstract: A robots (210A, 210B), which is fixed onto a base (20, 20B) having a rectangular shape, has a mechanical hand (211A, 211B). A plurality of robot tools, each of which is freely attached to the tip of the mechanical hand (211A, 211B) for pinching a part, and a plurality of trays (6) each containing assembling jigs to be used for assembling parts, are brought in a movable range (RA, RB) of the robot, and the assembling tools are set at a predetermined position within the movable range (RA, RB). Then, an assembling job for the parts is carried out by using the assembling tools thus set. With this arrangement, the exchanging processes of the assembling tools can be carried out without depending on the human hands, even when the type of the assembly product is changed. Consequently, it becomes possible to efficiently carry out the manufacturing process of a small number of many types of products.