Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.

Abstract: A sound reproduction device is configured to store a head of a user and reproduce sound. The sound reproduction device includes: a headrest portion; a partition portion attached to the headrest portion so as to protrude forward relative to a front surface of the headrest portion; a speaker disposed in the partition portion; and a sound absorbing structure provided in at least a part of the inner surface of the partition portion excluding a region corresponding to an output surface of the speaker.

Abstract: An imaging lens includes a positive first lens group and a second lens group, which are continuous in order from the position closest to the object side, as lens groups. During focusing, the distance between the first lens group and the second lens group changes. A stop is disposed closer to the image side than a lens which is second from the object side. A combined refractive power of all lenses closer to the object side than the stop is positive. The imaging lens includes an LA positive lens and an LB positive lens that satisfy a predetermined conditional expression at a position closer to the object side than the stop. An Abbe number of the LB positive lens is the maximum among Abbe numbers of all positive lenses closer to the object side than the stop.

Abstract: A communication assist device includes an information reception unit that receives a message transmitted from a passenger terminal owned by a passenger in a moving body, a moving body identification unit that identifies the moving body based on passenger information which is included in the message received by the information reception unit and by which the passenger is able to be identified, and an information transmission unit that transmits the passenger information and information related to the message in association with each other to a communication device provided to the moving body identified by the moving body identification unit. The information reception unit, the moving body identification unit, and the information transmission unit are provided outside the moving body.

Abstract: An acoustic apparatus includes the peripheral wall which is provided so as to surround the seat and in which the upper portion is opened, and the speakers which are provided inside the peripheral wall so as to face the seat and can output the reproduced sound from the sound source. The speakers are disposed in front of the ears of a person sitting on the seat.

Abstract: An acoustic control system includes a peripheral wall provided so as to surround a seat, and an upper portion of the peripheral wall being opened, a speaker provided inside the peripheral wall and capable of outputting a reproduced sound from a sound source, a microphone provided toward an outside of the peripheral wall and configured to collect an environmental sound around the peripheral wall, and a processor. The processor configured to suppresse a level of the reproduced sound in a predetermined frequency band from the speaker based on the environmental sound collected by the microphone.

Abstract: An acoustic control system includes a peripheral wall provided so as to surround a seat, and an upper portion of the peripheral wall being opened, a speaker provided inside the peripheral wall and capable of outputting a reproduced sound from a sound source, a microphone provided toward an outside of the peripheral wall and configured to collect an environmental sound around the peripheral wall, and a processor. The processor configured to suppresse a level of the reproduced sound in a predetermined frequency band from the speaker based on the environmental sound collected by the microphone.

Abstract: An acoustic apparatus includes the peripheral wall which is provided so as to surround the seat and in which the upper portion is opened, and the speakers which are provided inside the peripheral wall so as to face the seat and can output the reproduced sound from the sound source. The speakers are disposed in front of the ears of a person sitting on the seat.