Once the person with a hearing loss perceives the sound, he must still interpret it to understand it. In addition, it will also reduce eyestrain in speech reading. This refers to how much louder speech is than the background noise. The combined impact of distance and background noise can result in totally inaccessible listening environments for the individual with a hearing loss, even with a hearing aid.
Reverberation is measured in time.
The longer the time, the more of an echo effect that is produced, and individual sounds will become slurred together. Although the definition is a little unwieldy, most of us have experienced this reverberation or echo in school gyms and sports stadiums.