Sound

PET acoustic material refers to a type of sound-absorbing material made from polyethylene terephthalate (PET). PET is a thermoplastic polymer commonly used in the manufacturing of various products, including plastic bottles and packaging materials. However, when PET is processed and treated in a specific manner, it can be transformed into an effective acoustic material with sound-absorbing properties. PET acoustic material is engineered to absorb sound waves, reducing noise and reverberation in a given space. It is commonly used in applications where sound control and acoustic performance are important, such as in architectural and interior design projects, auditoriums, theaters, recording studios, offices, and public spaces. The manufacturing process typically involves recycling PET bottles and other PET waste materials. The PET is shredded into small flakes, melted, and then processed into a fibrous material. The resulting PET fibers are compressed and formed into panels, tiles, or other shapes that can be...

A distributed sound system and a live sound system are two different approaches to audio reinforcement, designed for different purposes and environments. Purpose and Environment Distributed Sound System: A distributed sound system is typically used in commercial or public spaces such as airports, shopping malls, offices, hotels, or restaurants. The primary goal is to evenly distribute sound throughout the entire area, providing background music or making announcements. Live Sound System: A live sound system is employed in venues where live performances take place, such as concerts, festivals, theaters, or clubs. It aims to deliver high-quality, immersive sound to the audience, enhancing the live experience. Sound Reinforcement Approach Distributed Sound System: In a distributed sound system, multiple speakers are installed throughout the space, strategically placed to provide consistent audio coverage. These systems often employ smaller speakers that are evenly distributed to ensure uniform sound levels and intelligibility across the entire...

STC, which stands for Sound Transmission Class, is a rating system used to measure and describe the sound insulation properties of building materials, such as walls, floors, and windows. The STC rating provides an indication of how well a material or assembly reduces the transmission of airborne sound from one space to another. The STC rating is measured in decibels (dB) and is determined through laboratory testing according to the procedures outlined in ASTM E90. The test involves exposing a partition (e.g., wall or door) to a range of sound frequencies and measuring the sound levels on both sides. The resulting data is used to calculate the STC rating. The STC rating reflects the overall sound transmission loss across a range of frequencies. Higher STC ratings indicate better sound insulation performance, meaning that less sound is transmitted through the material or assembly. The scale is logarithmic, which means that...