Abstract: An ultrasonic-motor-driving device is provided which allows fine adjustment of the periods of driving waves that are generated by a driving-wave-generating portion. A driving device for an ultrasonic motor includes a driving-wave-generating portion. The driving-wave-generating portion generates signals for driving piezoelectric elements included in the ultrasonic motor. The driving-wave-generating portion is constructed capable of generating rectangular waves including a plurality of rectangular waves with different periods.

Abstract: A voice input device includes a first microphone, a second microphone, and a processor. The second microphone has a lower distance decay rate than the first microphone. The processor is configured to acquire noise information of noise by comparing a first signal obtained from the first microphone with a second signal obtained from the second microphone. The processor is further configured to perform noise suppression processing based on the noise information.

Abstract: A microphone unit (1) is provided with: a case (11), in which a diagram (contained in a MEMS chip (12)) that vibrates due to sound pressure, an internal space (111) that houses the diagram, and an opening (112) that links the internal space (111) to the outside and serves as a tone hole, are disposed; and a film (14) that is formed by a material that is not permeable to air, and that is joined to the base (11) in such a manner as to cover the opening (112). An internal pressure regulation section (141) is disposed in the film (14).

Abstract: An ultrasonic-motor-driving device is provided which allows fine adjustment of the periods of driving waves that are generated by a driving-wave-generating portion. A driving device for an ultrasonic motor includes a driving-wave-generating portion. The driving-wave-generating portion generates signals for driving piezoelectric elements included in the ultrasonic motor. The driving-wave-generating portion is constructed capable of generating rectangular waves including a plurality of rectangular waves with different periods.

Abstract: There is provided an optical pickup device comprising a laser light source for emitting a laser beam, an object lens for focusing the laser beam onto the recording surfaces of layers 0 and 1 of an optical disk and condensing the laser beam onto the recording surfaces, photodetectors for receiving the laser beam reflected by the optical disk, and a diffraction grating for diffracting a part of the reflected laser beam toward the photodetectors, wherein data can be simultaneously written to layers 0 and 1. The photodetector detects the reflected light from layer 0 after being refracted by the diffraction grating, and detects the reflected light from layer 1 without being refracted, so that the data of layers 0 and 1 can be simultaneously read. Thus, data can be simultaneously read from and written to the recording surfaces of a plurality of layers of an optical disk.

Abstract: An aberration correction element includes a support substrate, a plurality of piezoelectric elements disposed on the support substrate, each of which is made up of a piezoelectric member and electrodes disposed at the upper and the lower sides of the piezoelectric member, and reflection portion disposed at the upper portion of the plurality of piezoelectric elements so as to reflect incident light. The reflection portion is a set of rectangular mirror segments of the same number as the number of the piezoelectric elements. The individual mirror segments are independent of each other and are bonded to upper sides of the individual piezoelectric elements, respectively.

Abstract: There is provided an optical pickup device comprising a laser light source for emitting a laser beam, an object lens for focusing the laser beam onto the recording surfaces of layers 0 and 1 of an optical disk and condensing the laser beam onto the recording surfaces, photodetectors for receiving the laser beam reflected by the optical disk, and a diffraction grating for diffracting a part of the reflected laser beam toward the photodetectors, wherein data can be simultaneously written to layers 0 and 1. The photodetector detects the reflected light from layer 0 after being refracted by the diffraction grating, and detects the reflected light from layer 1 without being refracted, so that the data of layers 0 and 1 can be simultaneously read. Thus, data can be simultaneously read from and written to the recording surfaces of a plurality of layers of an optical disk.