1. the impact of hearing is divided into three characteristic is. -Deaf immediately. Arising from the address in a loud 120 DB(a) is exceeded. -Temporary tinnitus occurs in the volume, ranging from 80 DB(a) or more soon. -Permanent tinnitus Occurs when a property is very loud levels for long periods of time. 2. Physiology such as side impact system of circulation of the blood. The endocrine and nervous systems, reproductive organ system dysfunction, contractions, and compression of the large intestine, etc. 3. psychology, such as creating a nuisance. Affect their sleep. Effects on learning and behavior interfere with conversation and entertainment. 4. social aspects Impact on creating a good relationship makes the lack of peace. 5. the economy With low productivity due to reduced performance, cost control voice. 6. environmental noise policy affects the lives of animals, such as animal panic and evacuation.
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