What are the differences in sound transmission between PVC and polypropylene?

When comparing the sound transmission properties of PVC (polyvinyl chloride) and polypropylene, several key differences emerge. PVC is denser and more rigid, which generally results in better sound insulation and reduced transmission of airborne noise. In contrast, polypropylene is lighter and more flexible, often allowing more sound to pass through.

PVC's higher density makes it effective at blocking mid-to-high-frequency sounds, while polypropylene tends to absorb vibrations better due to its elasticity, making it suitable for dampening low-frequency noise. Additionally, PVC is commonly used in construction for soundproofing applications, whereas polypropylene is often found in packaging and automotive components where vibration control is prioritized.

The choice between these materials depends on the specific acoustic requirements of the application, with PVC excelling in sound insulation and polypropylene offering advantages in vibration absorption.