Abstract: To provide an oxygen concentrator that can reduce pressure loss when suctioning raw air and that can increase the amount of suctioned raw air by an amount of reduction in pressure loss, and moreover that can reduce noise without significantly changing a basic structure of a compressor. The oxygen concentrator includes: a compressor that has a plurality of suction ports suctioning raw air and that generates compressed air by compressing suctioned raw air; a conduit through which the compressed air is sent; a silencer that has a suction side end introducing the raw air and a discharge side end discharging the raw air, with the silencer being connected with the conduit; and a plurality of connection conduits directly connecting the discharge side end of the silencer and the respective suction ports of the compressor.

Abstract: To provide an oxygen concentrator that can reduce pressure loss when suctioning raw air and that can increase the amount of suctioned raw air by an amount of reduction in pressure loss, and moreover that can reduce noise without significantly changing a basic structure of a compressor. The oxygen concentrator includes: a compressor that has a plurality of suction ports suctioning raw air and that generates compressed air by compressing suctioned raw air; a conduit through which the compressed air is sent; a silencer that has a suction side end introducing the raw air and a discharge side end discharging the raw air, with the silencer being connected with the conduit; and a plurality of connection conduits directly connecting the discharge side end of the silencer and the respective suction ports of the compressor.

Abstract: An audio signal processing apparatus includes an input unit to which at least an audio signal of a left channel, an audio signal of a right channel, and an audio signal of a center channel are supplied, a first output terminal unit for outputting the audio signal of the left channel, the audio signal of the right channel, and the audio signal of the center channel which are supplied to the input unit, a mixing unit for mixing the audio signal of the center channel to the audio signal of the left channel and mixing the audio signal of the center channel to the audio signal of the right channel to output the mixed signals as audio signals of two channels, and a second output terminal unit for outputting the audio signals of the two channels from the mixing unit.

Abstract: Electronic equipment switches inputs and outputs of audio-visual equipment when inputs and outputs that are not connected are selected. A microcomputer determines whether the electronic equipment is placed in a mode for automatically switching an input terminal. When the automatic mode is not set, an input terminal is switched to a designated input. When the automatic mode is set and a signal at a digital signal input terminal is detected, the input terminal is switched to the digital signal input terminal. When a digital signal is not detected, the electronic equipment sequentially selects a signal at optical, coaxial and analog terminals.

Abstract: When input equipment is instructed by a remote control unit on the basis of a display of a monitor, a data signal is transmitted from a microcomputer of an AV amplifier to a microcomputer of a CD changer. When the signal is received by a microcomputer of the CD changer, display data is formed in the microcomputer of the CD changer on the basis of data in a memory and is outputted. In the AV amplifier, a switch is switched to the CD changer side. A cursor is formed by the microcomputer of the AV amplifer, the cursor and display data from the CD changer are synthesized by an image synthesizing circuit and displayed on the monitor. When an instruction is generated by the remote control unit on the basis of the display on the monitor, position coordinates of the cursor on the picture plane are generated from the microcomputer of the A/V amplifier to the microcomputer of the CD changer. On the basis of the display data and the position coordinates, the CD changer is controlled by its microcomputer.

Abstract: A reproducing apparatus for a recording medium on which information signals and information indicating the type of the information signals are recorded includes a housing section, a reproducing section, a carrier mechanism, and a controller. The housing section houses plural recording media. The reproducing section reproduces a recording medium. The carrier mechanism takes out a recording medium from the housing section and carries the recording medium to the reproducing section. The controller controls the reproducing section and the carrier mechanism. The controller controls the carrier mechanism on the basis of category information indicating a genre and information related to a reproduction frequency generated on the basis of reproduction hysteresis information of the recording medium, so as to carry out relocation within the housing section of the recording media housed in the housing section.

Abstract: A microcomputer has an output port and an input port. A plurality of switches are provided between and matrix-connected to respective bits of the output port and respective bits of the input port. The microcomputer renders all of the bits of the output port in an output state, and in this state, checks whether an output of the output port is obtained at one of the bits of the input port. When an output of the output port is obtained at one of the bits of the input port, data indicating a manipulated one of the plurality of switches is acquired by rendering, in order, the bits of the output port in an output state, and then the process of acquiring data indicating a manipulated switch is again executed after a lapse of a predetermined amount of time. The acquired data is made effective if a first acquired data and a second acquired data are identical.