Abstract: According to one embodiment, a measuring method includes forming a partition including a lower portion arranged on a first surface side of a base and an upper portion protruding from a side surface of the lower portion, acquiring a first image including the partition, which is generated by emitting electromagnetic waves from the first surface side of the base or a second surface side opposed to the first surface of the base, analyzing the acquired first image, and measuring an amount of protrusion at which the end portion of the upper portion protrudes from the side surface of the lower portion, based on the analysis result.

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: Provided is a tire for a motorcycle having an improved turning stability on wet road surface, the tire comprises a tread composed of a rubber composition, which comes into contact with a road surface, wherein Hs being a rubber hardness and M300 being a tensile stress (MPa) at 300% elongation of the rubber composition of the tread satisfy Equations 1, 2, and 3: 60?Hs?80,??Equation 1: 2?M300?12, and??Equation 2: (M300?2)/(Hs?60)?0.75.

Abstract: Provided is a tire for a motorcycle having an improved turning stability on wet road surface, the tire comprises a tread composed of a rubber composition, which comes into contact with a road surface, wherein Hs being a rubber hardness and M300 being a tensile stress (MPa) at 300% elongation of the rubber composition of the tread satisfy Equations 1, 2, and 3: 60?Hs?80, ??Equation 1: 2?M300?12, and ??Equation 2: (M300?2)/(Hs?60)?0.75.

Abstract: Provided is a motorcycle tire having excellent overall performance including dry grip performance, wet braking performance, abrasion resistance, ice performance, and color tone. Included is a motorcycle tire having a tread portion including a tread rubber, the tread rubber being divided into at least three parts in the tire width direction, the tread rubber including a center rubber at its center, viewed in the tire width direction, and shoulder rubbers respectively on opposite sides of the center rubber, viewed in the tire width direction, the center rubber being formed of a center rubber composition containing predetermined amounts of a rubber component with a predetermined styrene-butadiene rubber content, silica, carbon black, and a resin, the shoulder rubbers each being formed of a shoulder rubber composition containing predetermined amounts of a rubber component with a predetermined styrene-butadiene rubber content, silica, carbon black, and a resin.