Abstract: A vehicle approach notifying device for notifying the approach of a vehicle by causing a loudspeaker to output a warning sound includes: a storage that stores a predetermined threshold of sound pressure; and a controller that: (i) causes a loudspeaker disposed outside a cabin of the vehicle to output the warning sound at a first sound pressure determined in accordance with a speed of the vehicle when a sound pressure of the warning sound acquired by a microphone disposed outside the vehicle is less than or equal to the predetermined threshold; and (ii) causes the loudspeaker to output the warning sound at a sound pressure lower than the first sound pressure when the sound pressure of the warning sound acquired by the microphone exceeds the predetermined threshold.

Abstract: A vehicle approach notifying device for notifying the approach of a vehicle by causing a loudspeaker to output a warning sound includes: a storage that stores a predetermined threshold of sound pressure; and a controller that: (i) causes a loudspeaker disposed outside a cabin of the vehicle to output the warning sound at a first sound pressure determined in accordance with a speed of the vehicle when a sound pressure of the warning sound acquired by a microphone disposed outside the vehicle is less than or equal to the predetermined threshold; and (ii) causes the loudspeaker to output the warning sound at a sound pressure lower than the first sound pressure when the sound pressure of the warning sound acquired by the microphone exceeds the predetermined threshold.

Abstract: A sound reproduction system provided for in-vehicle use includes: a music signal source; a first group of a first transducer, a second transducer, a third transducer and a fourth transducer connected to the music signal source; a signal processor shifting the phase of first sound signals output from the music signal source; and a second group of a first transducer, a second transducer, a third transducer and a fourth transducers connected to the signal processor.

Abstract: The sound reproduction system provided for in-vehicle use includes: a music signal source; a first group of a first transducer, a second transducer, a third transducer and a fourth transducer connected to the music signal source; a signal processor to shift the phase of first sound signals output from the music signal source; and a second group of a first transducer, a second transducer, a third transducer and a fourth transducer connected to the signal processor.

Abstract: A digital signal processing amplifier produces substantially no digital clipping. The amplifier includes an A/D converter provided with an overflow detecting function and a controller for communicating with external equipment and adapted such that an overflow of an input signal is detected and thereby an output level of a head unit serving as a source of the analog input signal is controlled.

Abstract: A digital amplification device has a digital amplifying unit, a low-pass filter for integrating a digital signal, and a current feedback circuit that is transformer-coupled to the low-pass filter and feeds back current to the differential input terminal. A signal related to distortion is fed back and the distortion is reduced.

Abstract: A digital signal processing amplifier to produce substantially no digital clipping is disclosed, the amplifier including an A/D converter provided with an overflow detecting function and a controller for communicating with external equipment and adapted such that an overflow of an input signal is detected and thereby an output level of a head unit serving as a source of the analog input signal is controlled.

Abstract: A digital amplification device has a digital amplifying unit, a low-pass filter for integrating a digital signal, and a current feedback circuit that is transformer-coupled to the low-pass filter and feeds back current to the differential input terminal. A signal related to distortion is fed back and the distortion is reduced.

Abstract: An inclination sensor having excellent rotational performance, longlasting stability and high sensing precision. The inclination sensor comprises a pendulum (10) rotatably attached to a case (1) of a fixed body secured to an attached member, a magnetic flux-generating means (11) attached to the pendulum (10), reed switches (4a) and (4b) attached to part of the case (1) corresponding to the locus along which the magnetic flux-generating means (11) moves, and a flange portion (12) which is a damping body being nonmagnetic and electrically conductive and disposed in the case (1) along the locus of the movement of the magnetic flux-generating means (11).

Abstract: The present invention aims at providing an inclination angle sensor that can be mounted on a vehicle such as an automobile, resistant to external disturbances such as vibrations, superior in rotational performance, and small in size. In order to achieve the object, an inclination angle sensor of the present invention includes: a non-magnetic and electrically conductive weight (1); a rotary shaft (2) fixed to the weight (1); a bearing (3) for rotatably supporting the rotary shaft (2); a frame (4) for securing the bearing (3); one or two combinations of reflection type photo-interrupter (6) consisting of a light-receiving element (27) and a light-emitting element (26) for varying signal in response to a movement of the weight (1); a flange part (7) provided to outstretch from an outer perimeter of the weight in parallel to or in a manner to form a predetermined angle with the rotary shaft (2); and a magnet (8) fixed to the frame (4) in a manner produce magnetic flux primarily toward the flange part (7).

Abstract: An object of the present invention is to provide an inclination sensor that has a superior rotational performance and long term stability, and is high in detecting accuracy. In order to achieve the above object, the inclination sensor of the present invention comprises a pendulum (10) mounted rotatably relative to a case (1) of a fixing body to be fixed to a mounting body, a magnetic flux generation means (11) mounted on the pendulum (10), reed switches (4a) and (4b) mounted on a part of the case (1) corresponding with a rotational path of the magnetic flux generation means (11), and a flange part (12) having nonmagnetic and electrically conductive properties defining a damping body arranged on the case (1) along the rotational path of the magnetic flux generation means (11).

Abstract: A sensor comprises a detecting element, a circuit board having digital correction function and having connection pads for digital correction for processing a signal of the detecting element, a connector connected electrically to the circuit board for exchanging signals between the circuit board and an external electric system, and holes through which connection pads for digital correction are visible. The holes are provided in the opening of the connector for contacting electrically with a probe for characteristic correction.

Abstract: An object of the present invention is to provide an automatic compensation sensor that can eliminate an exclusive input terminal for the compensation mode signal. To achieve this object, the present invention comprises a sensor body (1), a signal output terminal (5) for outputting signals from the sensor body (1), and a controller for compensating the output signal from this signal output terminal (5).

Abstract: An object of the present invention is to provide an automatic compensation sensor that can eliminate an exclusive input terminal for the compensation mode signal. To achieve this object, the present invention comprises a sensor body (1), a signal output terminal (5) for outputting signals from the sensor body (1), and a controller for compensating the output signal from this signal output terminal (5).