| Research & Development > eJournal > Novel Method of Determination of Absorption Coefficient | |
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| | Chapter : 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| 5. Result 5.1 Measurement of Reverberation Time. RT measurements were carried out at 9 locations distributed throughout the hall. These were made by impulses setting the recording on the graphics recorder with special interface for this purpose on the analyzer. Reverberation Time Measurements at 1000 Hz comparing Seman and Zafia with McNulty and the present report. |
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| Seman and Zafia Ref | RT = 1.23 seconds |
| McNulty Ref | RT = 1.7 seconds |
| From the above usage Sabine equation (1) Calculation of the absorption coefficient a from Eq. (1), Thus From the above the absorption coefficient for the room is 0.264 5.2 Results of the novel technique The plotted values of absorption coefficients for the decay using equation (2) are shown in Figure 2. The family of curves show the absorption coefficient from 0.1 to 1. The novel technique is to measure the equivalent decay in the hall and match the decay curve with the appropriate absorption coefficient. The measured decay is shown in Figure 3. Inspection of the two curves show that the nearest curve to the value predicted has an absorption coefficient of 0.3 to 0.35. average 0.325 |
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