Measurements of Acoustical Properties
For the practical applications of sound absorbing materials and sound barriers, it is important to know the acoustical characteristics such as absorption coefficient, transmission loss, etc.
Therefore, the experimental set up for measuring absorption coefficient and transmission loss is needed.
There are several experimental methods for measuring the acoustical characteristics of sound absorbing materials and sound barriers.
In our laboratory, measurement set up using impedance tube method is prepared.
This method is compact and economical compared with other experimental method.
The schematics of these set-up’s are shown in the figures below.