Disruptive noise is everywhere in offices telephones, chatter from colleagues, noise from printers and other office services. They are part and parcel of office life, despite being particularly distracting for workers and contributing to lo...

Polyester fiber composed of organic dibasic acid and glycol polycondensation of polyester by the spinning of synthetic fibres. Polyester fiber is mainly made of polyethylene terephthalate, Chinas commodity name is polyester, referred to as...