| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure that uses a Helmholtz-type sound absorbing structure, easily applicable also to a non-concrete building.SOLUTION: A floor structure is for mitigating noises conveyed to a lower floor from an upper floor of a unit building 1, where a floor part of the upper floor and a ceiling part of the lower floor of the unit building 1 are separated vertically with a space in between. The ceiling of the lower floor of the unit building 1 is formed by a ceiling board 18 supported by a plurality of ceiling joists 17,... located above that serve as a ceiling support, where a ceiling backside material 2 is fixed on an upper side surface of the plurality of ceiling joists 17,..., and a plurality of closed spaces 5,... surrounded by the ceiling board 18, the ceiling backside material 2 and the ceiling joists 17,... is formed, and holes 2a,... that communicate with an underfloor space 6 at a bottom of the floor part are drilled through the ceiling backside material 2 that forms the top surface of the plurality of closed spaces 5,.... |
