Loud machinery refers to equipment that produces significant noise during operation. This includes items like construction equipment, industrial machines, and power tools. The noise can be a result of mechanical movement, engine operation, or the impact of materials being processed. Such machinery is commonly used in various industries, including manufacturing, construction, and agriculture. While effective for completing tasks, the noise can pose risks to hearing and may require the use of personal protective equipment like earplugs or earmuffs to ensure worker safety.