Abstract: A vehicle front trunk includes a storing portion having a box shape that opens upward. The storing portion is disposed in front of a vehicular compartment and has a storing space therein. The storing portion includes a bottom wall and side walls extending upward from the bottom wall, and a through hole that is included in one of the bottom wall and the side walls and through which the storing space is communicated with an outer space outside the storing portion.

Abstract: A noise level prediction system for a vehicle configured to predict a noise to be perceived by an occupant of the vehicle includes: a parameter determiner configured to determine at least three parameters as parameters relating to a noise reduction effect when the noise is transmitted to the occupant, the parameter determiner being configured to determine, as the at least three parameters, a parameter relating to a sound insulation ability, a parameter relating to a sound absorption ability, and a parameter relating to a distance attenuation characteristic; and a calculator configured to calculate and predict a level of the noise to be perceived by the occupant by using the at least three parameters relating to the noise reduction effect determined by the parameter determiner.

Abstract: A front trunk includes a trunk box that opens toward one side and has a storing space therein and is disposed adjacent to a heat generator, and a metal layer disposed on at least a portion of an outer surface of the trunk box.

Abstract: A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.

Abstract: This storage unit is configured to store an outside-of-panel acoustic transfer function that is an acoustic transfer function involving an airborne sound that is a sound emitted from a sound source located outside a panel member and propagated through the air to an outer surface of the panel member, and a panel transmission function that is an acoustic transfer function from the outer surface of the panel member to an inner surface of the panel member. This sound transmission analyzing unit is configured to calculate, based on the outside-of-panel acoustic transfer function and the panel transmission function, an acoustic transfer function from the sound source via the air to the inner surface of the panel member.

Abstract: A sound absorbing structure includes a vehicle structure having a surface and at least one acoustic scatterer coupled to the surface. The at least one acoustic scatterer has a resonant frequency. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end, the channel open end being in fluid communication with the opening. The sound absorbing structure may be configured to absorb sound waves at a certain frequency generated by a noise source. The certain frequency may be substantially similar to the resonant frequency of the at least one acoustic scatterer.

Abstract: A roof structure includes a roof panel constituting a roof of a vehicle, a roof headlining constituting a ceiling of a vehicle cabin, and a stiffening board disposed between the roof panel and the roof headlining. The stiffening board is attached to a lower face of the roof panel by adhering at plural adhesion portions. Steps are formed at the stiffening board between the respective plural adhesion portions so as to widen a space between the stiffening board and the lower face of the roof panel.

Abstract: A roof structure includes a roof panel constituting a roof of a vehicle, a roof headlining constituting a ceiling of a vehicle cabin, and a stiffening board disposed between the roof panel and the roof headlining. The stiffening board is attached to a lower face of the roof panel by adhering at plural adhesion portions. Steps are formed at the stiffening board between the respective plural adhesion portions so as to widen a space between the stiffening board and the lower face of the roof panel.

Abstract: There is provided a vehicular structure including (i) a vehicular panel member configured by resin including reinforcing fibers, and (ii) a joined portion of a vehicle body that supports, all the way around, a peripheral portion of a predetermined area of the panel member and to which the peripheral portion of the predetermined area is joined, wherein the panel member has a bulging shape where both front and back surfaces of the panel member bulge out such that the thickness of the panel member gradually becomes thicker from a peripheral end portion to a central portion within the predetermined area supported all the way around by the joined portion

Abstract: There is provided a vehicular structure including (i) a vehicular panel member configured by resin including reinforcing fibers, and (ii) a joined portion of a vehicle body that supports, all the way around, a peripheral portion of a predetermined area of the panel member and to which the peripheral portion of the predetermined area is joined, wherein the panel member has a bulging shape where both front and back surfaces of the panel member bulge out such that the thickness of the panel member gradually becomes thicker from a peripheral end portion to a central portion within the predetermined area supported all the way around by the joined portion