A system and method for implementing dynamic spur avoidance in a high speed receiver environment is provided. More specifically, target material is coated onto a first substrate. A first acoustic driver having a first radiating surface and a second radiating surface is arranged and constructed so that the first radiating surface radiates sound waves into free air and the second radiating surface radiates sound waves into the acoustic waveguide so that sound waves are radiated at the open end. The films can further be used to form shaped articles such as sheets, food packaging such as sandwich wraps, thermoformed containers, and coatings for, for example, films and other substrates. The proxy server communicates instructions to one of the proxy servers to forward the data item to the requesting machine.