Various sound absorption / sound insulation materials are used for the purpose of making quiet in the industrial products and electric appliances. The evaluation of the sound absorption and sound insulation properties needs the measurement system using acoustic impedance tube or coupled room composed of the reverberation room and anechoic room. Moreover, the development of the material which has desired acoustical properties needs the software to predict the acoustic properties and the measurement of the material parameters. We offer the measurement system for evaluation and prediction of the acoustical materials and its prediction software.
Sound Transmission Loss Measurement System
This is the measurement system of the sound transmission loss for the acoustical materials. Sample is set in the opening coupled with the reverberation room and the anechoic room.
Measurement System of the Sound Absorption Coefficient in a Reverberation Room
This is the measurement system of the sound absorption characteristic of the acoustical materials in random incident condition. We provide the high accuracy system using impulse response measurement.
Measurement System of Sound Absorption Coefficient with Impedance Tube
This is the measurement system of the sound absorption in normal incident condition using impedance tube. We offer the very convenient, easy-to-use system based on the customer's requests.
Flow Resistivity Measurement System
This is the measurement system of the flow resistivity that is the most important parameter for determining acoustical properties. This system is according to ISO 9053 and realizes the accurate measurement under the 0.5 mm/s flow velocity condition.
Tortuosity & Characteristic Length Measurement System
This is the measurement system which measures the macroscopic geometry of the structure of porous materials. This system is developed under the collaboration with Katholic University of Leuven (KUL) in Belgium and uses ultrasonic sensor.
Elasticity Measurement System
This is the measurement system which measures the elastic moduli and loss factor of poroelastic materials. Both Young's modulus and shear modulus can be measured.
Prediction Software of Acoustical Properties for Multilayered Structures
This is the software which predicts sound absorption and sound insulation performance of the poroelastic materials using Biot model. This software makes prediction of acoustical properties of the multi-layered structures in various sound incident condition.