To contrive formation of a resonance sound absorption system by providing a ventilation passage directed from an opening part formed in a floor surface to a floor inside, and providing a cavity part communicating with the ventilation passage.
In a case where a resonance sound absorption system 20 is provided, for instance, a hole 11 is provided in a floor bedrock in the neighborhood of a wall and the body part 21 of the system 20 is housed. An opening part 22 is formed in the surface of a floor 10, a neck part 24 is provided so that a ventilation passage 23 directed from the opening part 22 to the inside of the floor 10 is formed, and interconnected to the body 21. In addition, a cavity part 25 communicating with the ventilation passage 23 is provided in the body 21. An indoor standing wave generated by weight source floor impact is reduced by utilizing a resonance phenomenon by mass of the neck part 24 and the air spring component of the cavity part 25 with regard to the system 20. Thereby the noise level of a low frequency band which causes the highest concern in a weight source floor impact sound can be effectively reduced, the resonance sound absorption system is disposed without being projected in a room, and if part of the resonance sound absorption system is made variable structure, tuning can be easily performed even if used in any shaped room.
| JPS59187942 | BUILDING PANEL |
| JP2015209734 | SOUND INSULATION PANEL |
| JPH11200528 | SOUND ABSORPTION PANEL |
TSUKADA SUSUMU
INABA KENJI
TAKESHITA MICHITAKA
