Abstract: A vehicle sound generation device includes a sound control circuit that sets one or more frequencies according to a number of revolutions of the rotary power source, and generates a synthetic sound signal representing a synthetic sound including one or more element sounds having the one or more frequencies. The sound control circuit sets the synthetic sound so that a sound pressure of the synthetic sound includes a reference sound pressure component and a variable sound pressure component. A magnitude of the reference sound pressure component increases as the number of revolutions of the rotary power source increases, and a magnitude of the variable sound pressure component varies within a predetermined amplitude with a period of a predetermined increase amount of the number of revolutions as the number of revolutions of the rotary power source increases.

Abstract: A vehicle sound generation device includes a sound control circuit that sets a plurality of frequencies according to a number of motor revolutions and sound pressures to be applied to the plurality of frequencies and generates a synthetic sound signal representing a synthetic sound, and a travel situation estimation circuit that estimates a first travel situation in which the driver accelerates or decelerates a vehicle at a first rate and a second travel situation in which the driver accelerates or decelerates the vehicle at a second rate greater than the first rate, and the sound control circuit changes the magnitudes of the sound pressures to be applied to the plurality of frequencies based on whether the first travel situation, the second travel situation or neither the first travel situation and the second travel situation is estimated.

Abstract: A vehicle sound generation device includes a sound control circuit that sets one or more frequencies according to a number of revolutions of the rotary power source, and generates a synthetic sound signal representing a synthetic sound including one or more element sounds having the one or more frequencies. The sound control circuit sets the synthetic sound so that a sound pressure of the synthetic sound includes a reference sound pressure component and a variable sound pressure component. A magnitude of the reference sound pressure component increases as the number of revolutions of the rotary power source increases, and a magnitude of the variable sound pressure component varies within a predetermined amplitude with a period of a predetermined increase amount of the number of revolutions as the number of revolutions of the rotary power source increases.

Abstract: A vehicle sound generation device includes a sound control circuit that sets a plurality of frequencies according to a number of motor revolutions and sound pressures to be applied to the plurality of frequencies and generates a sound signal representing a synthetic sound including the sounds of the plurality of frequencies to which the set sound pressures have been applied, a speaker that outputs a sound according to the sound signal, generated by the sound control unit 12, and a travel situation estimation circuit that estimates a travel situation in which the driver accelerates or decelerates a vehicle at a rate below a predetermined threshold. The sound control circuit generates the sound signal representing only the single sound of the frequency in a range from 400 Hz to 900 Hz among the sounds of the plurality of frequencies when the travel situation is estimated.

Abstract: A vehicle sound control device includes: a motor rotation speed detector (2) configured to detect the rotation speed of a motor that drives a vehicle; a speaker (4) configured to produce a vehicle interior sound including a motor sound changing in accordance with the rotation speed of the motor in an interior of the vehicle; an emphasizing order setting unit (6) configured to determine an order component to be emphasized in the motor sound in accordance with the rotation speed detected by the motor rotation speed detector (2); and a vehicle interior sound control unit (7) configured to control the vehicle interior sound produced by the speaker (4) so that the emphasizing order component determined by the emphasizing order setting unit (6) is emphasized. The emphasizing order setting unit (6) determines the order component to be emphasized so that a higher order component is emphasized as the rotation speed increases.

Abstract: A vehicle sound control device includes: a motor rotation speed detector (2) configured to detect the rotation speed of a motor that drives a vehicle; a speaker (4) configured to produce a vehicle interior sound including a motor sound changing in accordance with the rotation speed of the motor in an interior of the vehicle; an emphasizing order setting unit (6) configured to determine an order component to be emphasized in the motor sound in accordance with the rotation speed detected by the motor rotation speed detector (2); and a vehicle interior sound control unit (7) configured to control the vehicle interior sound produced by the speaker (4) so that the emphasizing order component determined by the emphasizing order setting unit (6) is emphasized. The emphasizing order setting unit (6) determines the order component to be emphasized so that a higher order component is emphasized as the rotation speed increases.

Abstract: The seat face's position is adjusted by the position adjusting device in such a manner that the passenger's hip point Hpt lowers as the seat cushion is moved rearward, and the degree of the hip point lowering is configured such that the lowering degree of the hip point Hpt at the central section B is greater than that of the hip point lowering at the rear section C and the front section A that are located behind and before the central section C respectively. Accordingly, the proper sitting position to any passengers with different body sizes can be provided.

Abstract: The present invention provides a surface treated steel sheet for electronic components which does not include lead, which is a hazardous substance with environmental impact, and, in particular, satisfies the solder wettability after retort treatment, a rust-proof property and a whisker-proof property simultaneously. More specifically, the present invention is a surface treated steel sheet with less environmental impact for electronic components excellent in solder wettability, a rust-proof property and a whisker-proof property and having an Sn—Zn alloy layer which is formed by plating Sn and Zn on a steel sheet or a Ni plated steel sheet and then applying thermal diffusion treatment, or by plating Sn—Zn alloy on a steel sheet or a Ni plated steel sheet, characterized in that the amount of said Sn—Zn alloy layer is not less than 3 g/m2, the Zn/Sn ratio (in weight ratio) is 0.01 to 10, more preferably 0.01 to 0.

Abstract: The present invention provides a surface treated steel sheet for electronic components which does not include lead, which is a hazardous substance with environmental impact, and, in particular, satisfies the solder wettability after retort treatment, a rust-proof property and a whisker-proof property simultaneously. More specifically, the present invention is a surface treated steel sheet with less environmental impact for electronic components excellent in solder wettability, a rust-proof property and a whisker-proof property and having an Sn—Zn alloy layer which is formed by plating Sn and Zn on a steel sheet or a Ni plated steel sheet and then applying thermal diffusion treatment, or by plating Sn—Zn alloy on a steel sheet or a Ni plated steel sheet, characterized in that the amount of said Sn—Zn alloy layer is not less than 3 g/m2, the Zn/Sn ratio (in weight ratio) is 0.01 to 10, more preferably 0.01 to 0.