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The Albuquerque Bernalillo County Water Utility Authority in Albuquerque, New Mexico operates a 76-million gallons per day (rated capacity) wastewater treatment plant that treats a daily average of five million gallons of sewage from New Mexico’s largest city and its surroundings.
Noise-induced hearing loss (NIHL) is the most common permanent and preventable occupational injury impacting workers today. And unlike most injuries it is painless, progressive, permanent and preventable.
Industrial plants are known for being loud, acoustically-harsh environments. The combination of high ceilings, reflective surfaces and the din from heavy machinery creates an optimal environment for reverberation and noise.
The world is getting louder. Scientists define "noise" as unwanted sound, and the level of background din from human activities has been doubling roughly every three decades, beating population growth. Road traffic in the United States has tripled over the last 30 years. By 2032, the number of passenger flights is expected to be nearly double the 2011 figure—at peak hours, planes are even audible overhead 70 percent of the time in the remote backcountry of Yosemite National Park.
