Acoustical Materials

Acoustical Properties

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.

Normal Incidence Absorption Coefficient
Normal Incidence Transmission Loss
Random Incidence Transmission Loss
Measurement of Flow Resistivity
Researcher
김준구
김준구
김호용
김호용
민동우
민동우
박한솔
박한솔
최익성
최익성