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.
How the Lack of Love Affects Two Men How the Lack of Love Affects Two Men How the Lack of Love Affects Two Men () is a 2006 South Korean film. Dong Chol-dong is a widower who lives with his only son, Dong-hyun. Chol-dong makes his living by blackmailing companies for their immoral activities, and in his spare time devotes himself to such activities as measuring the length of toilet paper, so he can sue the paper company if it is shorter than advertised. His son, Dong-hyun, is a bully who will go to any lengths to get what he wants. The lives of these two men take