Abstract: A pressure fluctuation absorbing structure includes: a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof; and a partition member disposed on the surface of the perforated member and including a partition wall that partitions the plurality of holes in units of a predetermined number of one or more holes, and a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes.

Abstract: According to one embodiment, a sound absorption device includes: a first plate having a plurality of first holes; a second plate facing the first plate in a first direction; a first frame connecting the first plate and the second plate; and a third plate supported by the first frame so as to vibrate in the first direction within the first frame. A first space is formed in the first frame between the first plate and the third plate. A second space is formed in the first frame between the second plate and the third plate. The third plate includes a first portion and a second portion, the second portion having a higher vibration speed than the first portion.

Abstract: A compound represented by the formula [I] wherein each symbol is as defined in the specification or a pharmacologically acceptable salt thereof, and a pharmaceutical composition containing the compound as an active ingredient.

Abstract: Air conditioning equipment that ensures sufficient noise reduction in the low frequency range of a few hundred hertz or below. The air conditioning equipment is characterized by including a heat exchanger for exchanging heat between air and refrigerant of a refrigeration cycle, a fan that supplies air to the heat exchanger, an air duct in which the fan is installed and through which acoustic waves are propagated, and a plurality of small holes that blows a jet into the air duct and sucks a jet from the air duct by a pressure difference between the blow side and the suction side of the fan.

Abstract: A compound represented by the formula [I] wherein each symbol is as defined in the specification or a pharmacologically acceptable salt thereof, and a pharmaceutical composition containing the compound as an active ingredient.

Abstract: A compound represented by the general formula (I) or a salt thereof: wherein represents —CH?CH—, —CH2—CH2— or the like, between R1 and the carbon atom at 4?-position represents a single bond or a double bond, between R2 and the carbon atom at 5-position represents a single bond or a double bond, and for example, 1) when represents —CH?CH— or —CH2—CH2—, and between R1 and the carbon atom at 4?-position represents a double bond, R1 represents ?C(R11)(R12) (wherein R11 represents a lower alkyl group or the like and R12 represents a hydrogen atom or the like) or the like, and R2 represents a hydroxyl group or the like, or R2 may be combined together with the carbon atom at 5-position to form a carbonyl group, and 2) when represents —CH?CH— or —CH2—CH2—, and between R1 and the carbon atom at 4?-position represents a single bond, R1 represents —OCH(R1a)(R1b) (wherein R1a represents a lower alkyl or the like and R1b represents a hydrogen atom or the like) or the like, and R2 re

Abstract: Air conditioning equipment that ensures sufficient noise reduction in the low frequency range of a few hundred hertz or below. The air conditioning equipment is characterized by including a heat exchanger for exchanging heat between air and refrigerant of a refrigeration cycle, a fan that supplies air to the heat exchanger, an air duct in which the fan is installed and through which acoustic waves are propagated, and a plurality of small holes that blows a jet into the air duct and sucks a jet from the air duct by a pressure difference between the blow side and the suction side of the fan.

Abstract: Provided is a compound represented by the general formula (I) or a salt thereof: wherein, —XY— represents —CH?CH— and the like, between R2 and the carbon atom at 5-position represents a single bond or a double bond, R1 represents a lower alkyl group, a formyl group, a carboxyl group, a lower alkoxycarbonyl group (wherein a lower alkyl moiety of said lower alkoxycarbonyl group may be substituted with a heterocyclic group) and the like, and R1a represents a hydrogen atom, provided when R1 represents a lower alkoxycarbonyl group and the like, R1a may further represents a lower alkoxycarbonyl group and the like, when between R2 and the carbon atom at 5-position is a single bond, R2 represents a hydroxyl group and the like, and when between R2 and the carbon atom at the 5-position is a double bound, R2 combines with the carbon atom at 5-position to form a hydroxime group (—C(?NOH)) and the like, and R3 represents a hydroxyl group or a tri(lower alkyl)silyloxy group.

Abstract: A compound represented by the general formula (I) or a salt thereof: wherein represents —CH?CH—, —CH2—CH2— or the like, between R1 and the carbon atom at 4?-position represents a single bond or a double bond, between R2 and the carbon atom at 5-position represents a single bond or a double bond, and for example, 1) when represents —CH?CH— or —CH2—CH2—, and between R1 and the carbon atom at 4?-position represents a double bond, R1 represents ?C(R11)(R12) (wherein R13 represents a lower alkyl group or the like and R12 represents a hydrogen atom or the like) or the like, and R2 represents a hydroxyl group or the like, or R2 may be combined together with the carbon atom at 5-position to form a carbonyl group, and 2) when represents —CH?CH— or —CH2—CH2—, and between R1 and the carbon atom at 4?-position represents a single bond, R1 represents —OCH(R1a)(R1b) (wherein R1a represents a lower alkyl or the like and R1b represents a hydrogen atom or the like) or the like, and R2 represen

Abstract: A compound represented by the general formula (I) or a salt thereof: 1

Abstract: Provided is a compound represented by the general formula (I) or a salt thereof: 1