Even though there had been warnings about the possible dangers of lead paint as early as the 1900s, both federal and state officials still routinely recommended its use. When a 1949 study pointed out the health hazards it posed to young children, there was a strong backlash, and a real ban did not occur for nearly 30 years afterward. Pre-1978 lead paint remains in many buildings, and still has the potential to cause harm.

When addressing people using public address equipment, the speaker desires to have all the people understand what is said with no hindrance. This is meanwhile not always achieved because the sound could be altered by the devices used before it reaches the audience. There are many individuals and firms that help in moderating the voice to ensure that it gets to audience in a clear form. There are many advantages that are attached to firms involved in acoustical testing in Jacksonville.