Performance Testing And Standards For PET Filament Sound Insulation Felt

Performance testing is a critical step in evaluating the sound insulation effectiveness and durability of PET filament sound insulation felt. Key testing parameters include sound insulation performance (transmission loss), frequency response analysis, material density, thickness uniformity, sound absorption coefficients, acoustic impedance, and sound insulation spectrum analysis. Long-term and specialized performance assessments cover durability, thermal aging resistance, hygrothermal stability, temperature adaptability (e.g., thermal conductivity, thermal expansion coefficient, low-temperature brittleness), and resilience characteristics (e.g., recovery rate, permanent compression set).
Relevant testing standards include international standards such as ASTM E90 and the ISO 10140 series, as well as Chinese national standards like GB/T 19889.3 and GB 50009. Certain products comply with the latest national standards regarding residential sound insulation requirements. Commonly used testing equipment includes acoustic test chambers, microphones, sound level meters, signal generators, environmental aging chambers, universal material testing machines, and thermal conductivity testers.