Sound insulation performance standard according to the Architectural Institute of Japan
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Sound insulation performance standard according to the Architectural Institute of Japan
| Building | Room purpose | Part | Application grade | |||
|---|---|---|---|---|---|---|
| Special grade (Especially excellent) |
Grade 1 (Excellent) |
Grade 2 (Standard) |
Grade 3 (Slightly inferior) |
|||
| Multiple dwelling complex (Apartment/Condo) | Living space | Separation wall between adjacent units | D-55 | D-50 | D-45 | D-40 |
| Hotel | Guest room | Separation wall between guest rooms | D-55 | D-50 | D-45 | D-40 |
| Office | Room requiring privacy in business | Partition wall between rooms Separation wall between tenants |
D-50 | D-45 | D-40 | D-35 |
| Schools | Regular classroom | Partition wall between rooms | D-45 | D-40 | D-35 | D-30 |
| Hospital | Hospital room (individual room) | 〃 | D-50 | D-45 | D-40 | D-35 |