Unfair labor practice. An unfair labor practice in US labor law refers to certain actions taken by employers or unions that violate the National Labor Relations Act of 1935 (49 Stat. 449) 29 U.S.C. Â§ 151â169 (also known as the NLRA and the Wagner Act after NY Senator Robert F. Wagner) and other legislation.
Advanced age is the most common cause of hearing loss. One out of three people age 65-74 has some level of hearing loss. After age 75, that goes up to one out of every two people. Researchers don't fully understand why hearing declines with age. It could be that lifetime exposure to noise and other damaging factors slowly wear down the ears' delicate mechanics.
Humans can generally sense sounds at frequencies between 20 and 20,000 cycles per second, or hertz (Hz)âalthough this range shrinks as a person ages. Prolonged exposure to loud noises within the audible range have long been known to cause hearing loss over time.