The non-linear properties of foam media, including the degree of entropy, are crucial to the design of wave-transmitting foams. For example, the thickness of a particular film, the thickness of the Plateau border, and the presence of millimetric bubbles affect the acoustic properties.

These parameters have a strong impact on the properties of a foam. Further, the frequency-frequency relationship between wave-transmitting foam and the density of its material are crucial. The thickness and fraction of film on the surface of a bubble determine the sound velocity in a wave-transmitting foam.

This factor is directly related to the liquid fraction in a foam. The liquid fraction and the film thickness must be taken into consideration in order to properly predict the resonance frequency. The gas density has no effect on the low frequency limit China CASCELL® HF foam . This fact highlights that the gas properties are important for setting the intrinsic dissipation mechanism. Aspects of the acoustic properties of foam are also important for the design of a wave-transmitting foam.

The major semiaxis of the cross-section must coincide with the wave transmission’s wavelength in order to create a cavity of zero-amplitude. The stress is zero until the wave reaches the cavity, which is the most critical portion of the foam. Aspects such as these can influence the structure and properties of a wave-transmitting polyurethane.

The density of wave-transmitting foam is a major factor determining its acoustic properties. The density of the material and the pore space determine the amount of fluid in a foam. The acoustic properties of a wave-transmitting foam depend on its composition and structure. Further, the acoustic frequency of a foam is important as it affects the way waves are absorbed.