Tinnitus masker issues associated with use of tinnitus maskers: the "safe" level of continuous sound depends on the duration of the sound. For maskers worn continuously, or most of the day, a safe level is no more than 70db, in accordance with EPA maximum safe exposure level for 24-hour environmental sound. Maskers louder than 45db or so (the ambient background level of an average home living area) may start to interfere with understanding conversation (about 60db). Masking of high frequency tinnitus (>6,000hz) is difficult because of the resonance characteristics of the human ear as well as high frequency limitations of in-ear devices.
Effects of advertising on teen body image found that exposure to media images of lean and muscular men increases muscle dissatisfaction and depression in young men. Some researchers believe that men are usually more satisfied than women with their physical appearance. Other researchers, however, state that men still struggle with body image. Men believe that they are either too thin or too heavy and therefore do not meet the male ideal body type of lean and muscular. Since boys are much less likely to discuss their issues about their body image, the statistics pertaining to the number of boys of whom this affects varies because so many