Abstract: A vibration generating device includes a housing; a vibration body in the housing; an elastic support member fixed to the housing and supporting the vibration body; and a driver that applies a vibration force to the vibration body. The elastic support member includes a vibration plate configured to support the vibration body; a front fixed plate disposed in front of the vibration plate and fixed to the housing; a rear fixed plate disposed behind the vibration plate and fixed to the housing; a first elastic plate connecting one of a left or right end of the vibration plate to the front fixed plate; and a second elastic plate connecting the other one of the left or right end to the rear fixed plate. The first elastic plate is isolated from the rear fixed plate, and the second elastic plate is isolated from the front fixed plate.

Abstract: A vibration generating device includes a housing; a vibration body in the housing; an elastic support member fixed to the housing and supporting the vibration body; and a driver that applies a vibration force to the vibration body. The elastic support member includes a vibration plate configured to support the vibration body; a front fixed plate disposed in front of the vibration plate and fixed to the housing; a rear fixed plate disposed behind the vibration plate and fixed to the housing; a first elastic plate connecting one of a left or right end of the vibration plate to the front fixed plate; and a second elastic plate connecting the other one of the left or right end to the rear fixed plate. The first elastic plate is isolated from the rear fixed plate, and the second elastic plate is isolated from the front fixed plate.

Abstract: A vibration generator includes a housing, a vibrating body accommodated in the housing, an elastic support supporting the vibrating body such that the vibrating body can vibrate along a first direction and a second direction intersecting each other, and a magnetic drive configured to drive the vibrating body along the first direction and the second direction using a magnetic force, and wherein the magnetic drive includes a plurality of first magnetic field generators disposed side by side at a predetermined interval in the vibrating body in the first direction or the second direction, and a plurality of second magnetic field generators disposed on positions facing both ends of each of the plurality of first magnetic field generators in the housing, and wherein a longitudinal direction of the housing is in a third direction intersecting the first direction and the second direction.

Abstract: A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

Abstract: A vibration generation apparatus includes a casing, a magnet attached in the casing, a vibrator having a coil that vibrates in the casing, an elastic support member connected to the casing and holding the vibrator in the casing, and a flexible interconnect member. One end of the flexible interconnect member is connected to the electric wire of the coil, and the other end of the flexible interconnect member protrudes to the outside of the casing. The casing is provided with an opening through which the interconnect member passes, and the interconnect member is supported by a support in the casing.

Abstract: A vibration generator includes a housing, a vibrating body accommodated in the housing, an elastic support supporting the vibrating body such that the vibrating body can vibrate along a first direction and a second direction intersecting each other, and a magnetic drive configured to drive the vibrating body along the first direction and the second direction using a magnetic force, and wherein the magnetic drive includes a plurality of first magnetic field generators disposed side by side at a predetermined interval in the vibrating body in the first direction or the second direction, and a plurality of second magnetic field generators disposed on positions facing both ends of each of the plurality of first magnetic field generators in the housing, and wherein a longitudinal direction of the housing is in a third direction intersecting the first direction and the second direction.

Abstract: A vibration generation apparatus includes a casing, a magnet attached in the casing, a vibrator having a coil that vibrates in the casing, an elastic support member connected to the casing and holding the vibrator in the casing, and a flexible interconnect member. One end of the flexible interconnect member is connected to the electric wire of the coil, and the other end of the flexible interconnect member protrudes to the outside of the casing. The casing is provided with an opening through which the interconnect member passes, and the interconnect member is supported by a support in the casing.

Abstract: A method for producing forsterite microparticles having a primary particle size of 1, to 50 nm, as determined through electron microscopy. The method includes spray-drying, in an atmosphere of 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

Abstract: A method for producing forsterite microparticles having a primary particle size of 1 to 200 nm, as determined through electron microscopy, characterized in that the method includes spray-drying, at 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

Abstract: A method for producing forsterite microparticles having a primary particle size of 1 to 200 nm, as determined through electron microscopy, characterized in that the method includes spray-drying, at 50° C. or higher and lower than 300° C., a solution containing a water-soluble magnesium salt and colloidal silica at a mole ratio of magnesium atoms to silicon atoms (Mg/Si) of 2; and subsequently, firing the spray-dried product in air at 800 to 1,000° C.

Abstract: A process for producing lithiated manganese oxide having a layered rock-salt structure, which comprises burning lithium and manganese materials or pretreated materials thereof at a temperature needed to synthesize LiMnO.sub.2, and then quenching the burnt materials.

Abstract: In a scrambled-communication system, a transmitting station generates a scrambling noise having a periodically-recurrent series of noise patterns and scrambles an information signal by simply summing the scrambling noise to the information signal, whereby the information signal is totally unintelligible by an interceptor. At a receiving station, a noise-cancelling signal is generated by an adaptive transversal filter and supplied to a subtractor where it is combined with the scrambled signal to recover the information signal. For generating the noise-cancelling signal, a descrambling noise identical to the scrambling noise is generated. The filter has a tapped-delay line for receiving the descrambling noise and a plurality of variable tap weights connected respectively to taps of the tapped-delay line.

Abstract: An echo controller comprises a parallel circuit of an echo suppressor and a self-adaptive echo canceller near an echo path of a long-distance telephone network. The echo controller further comprises a mode switch responsive to levels of a received signal, an unprocessed signal, and an output signal of the echo canceller and operable during absence of double talk for suspending operation of the echo canceller and putting instead the echo suppressor into operation only when characteristics of the echo path and operation of the echo canceller are objectionable.