Experiment name
Procedure
Measure the Volume of a hall.
Measure the area of different sound absorbing surfaces.
Observation
1. For a hall,
l = ______m²
b = _____m²
h = _____m²
2. Volume of hall,
l × b × h = _____ m³
3. Total absorption
Calculations
Observation Table
| Object | Surface Area | Absorption Coefficient | Total Absorption |
|---|---|---|---|
| Walls | ___ m² | 0.03 | |
| Floor | ___ m² | 0.01 | |
| Ceilings | ___ m² | 0.04 | |
| Soft board | ___ m² | 0.3 | |
| Wooden door | ___ m² | 0.3 | |
| Curtains | ___ m² | 0.2 | |
| Person | ___ m² | 0.46 | |
| Straw board | ___ m² | 0.3 |
| Sr. No. | Particulars | Readings |
|---|---|---|
| 1 | Length of a hall | |
| 2 | Breadth of a hall | |
| 3 | Height of a hall | |
| 4 | Area of floor | |
| 5 | Area of ceiling | |
| 6 | Area of wall no.- 1 | |
| 7 | Area of wall no.- 2 | |
| 8 | Area of door | |
| 9 | Effective area of wall no.- 2 | |
| 10 | Area of wall no.- 3 | |
| 11 | Area of wall no.- 4 | |
| 12 | Area of 3 windows | |
| 13 | Effective area of wall no.- 4 | |
| 14 | Volume of a hall | |
| 16 | Total Surface area of a hall |
Result
- Reverberation time of Physics Laboratory is ____Sec.
- Reverberation time of hall is more / less / Optimum.