Armstrong Sound Level Meter – This completely FREE app from Armstrong Ceilings and Walls measures the sound level in your interior space and recommends the proper ceiling/wall treatment for optimal acoustical comfort. This tool can help you diagnose acoustical issues or simply increase awareness of noise in your space. Real time, Log view, Maximum, and Average sound levels are displayed and recorded on your iPhone, iPad, or iPod. The Sound Log keeps track of your measurements with audio recordings and the treatment recommendations. In addition, you have the option to send your results directly to an Armstrong TechLine acoustical expert who can help you select the best ceiling for your space.