Abstract: An interior sound to be output from a room speaker of an electric vehicle is generated. An environmental state of the electric vehicle is estimated based on at least one of information on driving environment of the electric vehicle and information on surrounding environment of the electric vehicle. It is determined whether a process condition of the interior sound is satisfied based on the estimated result of the environmental state. When it is determined that the process condition of the interior sound is satisfied, the interior sound is processed based on the information on a sound process specification corresponding to the estimated result used for the determination of the process condition and is output from the room speaker.

Abstract: An electric vehicle is configured to be switchable to an autonomous driving mode. The electric vehicle comprises an accelerator pedal, a shift device, a speaker, and a controller. The speaker outputs a pseudo engine sound. When the electric vehicle is not in the autonomous driving mode, the controller changes a motor torque and the pseudo engine sound in response to an operation state of the accelerator pedal and the shift device operated by a driver. When the electric vehicle is in the autonomous driving mode, the controller virtually determines the operation state of the accelerator pedal and the shift device and changes at least one of the motor torque and the pseudo engine sound in response to the virtual operation state.

Abstract: A battery electric vehicle that uses an electric motor as a traction power unit includes one or more speakers that output sound to at least one of inside and outside of the vehicle, one or more processors, and one or more storage devices for storing usage state information of the electric vehicle and sound source data. The one or more processors estimate fitness of the battery electric vehicle based on the usage state information. The one or more processors generate, based on the sound source data, a sound in accordance with the fitness. The one or more processors are configured to output the generated sound through the one or more speakers.

Abstract: Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3×104 N·s/m4 or more, a Young's modulus E of 1.2×103 to 2.0×104 N/m2, and a loss factor ? of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.

Abstract: Disclosed is a sound-absorbing material, which has a flow resistivity R of 3.3×104 N·s/m4 or more, a Young's modulus E of 1.2×103 to 2.0×104 N/m2, and a loss factor ? of 0.12 or less. The sound-absorbing material of the present invention can enhance a sound absorption capability in a wide range of a low/intermediate-frequency region to a high-frequency region at a higher level as compared with conventional sound-absorbing materials.

Abstract: The resin-made floor panel structure including a trunk floor F1 made of resin integrally forming a spare tire storage space S1, and a trunk board B1 made of resin disposed so as to cover the floor panel, fitting parts Sw1, Bk1 for achieving the closure of the spare tire storage space are integrally formed respectively in the trunk floor and trunk board. Thereby, in using resin materials for a floor panel, transmission of noise in the floor section to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Abstract: The resin-made floor panel structure including a trunk floor F made of resin, and a trunk board B made of resin disposed so as to cover the trunk floor, a foamed layer having foams exposed at least in part is provided only on the side of the trunk board facing the floor panel. Thereby, in using resin materials for a floor panel, transmission of noise in the floor to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Abstract: The resin-made floor panel structure including a trunk floor F made of resin, and a trunk board B made of resin disposed so as to cover the trunk floor, a foamed layer having foams exposed at least in part is provided only on the side of the trunk board facing the floor panel. Thereby, in using resin materials for a floor panel, transmission of noise in the floor to the compartment side can be suppressed by a relatively simple structure without increasing the weight.

Abstract: Rigidity distribution of trunk floor is uneven, and intervals between high rigidity portions and low rigidity portions are set uneven, and more specifically a plurality of concave commodity storage spaces are integrally formed in the trunk floor, and dimensions of the these storage spaces and/or walls formed among storage spaces are set differently from each other, so that the rigidity of the trunk floor is set uneven. Thereby, in using resin materials for a floor panel, vibrations in the floor can be suppressed by a relatively simple structure without increasing the weight.

Abstract: The resin-made floor panel structure including a trunk floor F1 made of resin integrally forming a spare tire storage space S1, and a trunk board B1 made of resin disposed so as to cover the floor panel, fitting parts Sw1, Bk1 for achieving the closure of the spare tire storage space are integrally formed respectively in the trunk floor and trunk board. Thereby, in using resin materials for a floor panel, transmission of noise in the floor section to the compartment side can be suppressed by a relatively simple structure without increasing the weight.