• Acoustical, physical and mechanical characterization of absorbing materials
  
• Transmission Loss of materials and complex systems ( mufflers, silencers)
  
• Development and optimazion of innovative materials
  
• Training and education
  

Acoustical characterization of absorbing materials
Measurement of normal incidende sound absorption coefficient and surface impedance according to ISO Standard 10534-2 and measurement of in-situ sound absorption coefficient according to ISO Standard 13472-1 (Adrienne method).

Complex acoustical parameters
Measurement of characteristic impedance, complex wave number, complex density and complex sound velocity by means of 3 microphone technique and transfer matrix approach.

Transmission Loss of materials and complex systems
Measurement of Transmission Loss of homogeneous porous materials, multilayred system, mufflers and silencers.

Physical characterization of absorbing materials
. Airflow resistivity measurement according to ISO Standard 9053;
. Porosity measurement by means of compression of ideal gases based method;
. Tortuosity method by means of ultrasonic method;
. Viscous and thermal characteristic length by means of inversion approach.

Mechanical characterization of porous and viscoelastic materials
Measurement of elastic properties (Young modulus, Poisson ratio, loss factor) of poroelastic materials by means of mechanical impedance and lateral deformation tests; Measurement of dynamic stiffness according to ISO Standard  ISO 9052-1.

Development and optimazion of innovative materials
Materiacustica srl supports companies in the realization and optimization of new absorbing materials.

Training and education
Materiacustica srl organises training courses for researchers and consultants which would like to deepen their knowledge in the field of porous material testing, modelling and optimazion.