AUDIOLOGY & SLP MATERIALs

     I    INTRODUCTION:                Noise is derived from the Latin word “nausea” implying ‘unwanted sound’ or ‘sound that is loud,             unpleasant or unexpected’. The noise originates from human activities, especially the urbanization and the d     evelopment of transport and industry. Though, the urban population is much more affected by such pollution, however, small town/villages along side roads or industries are also victim of this problem. Noise is becoming an increasingly omnipresent, yet unnoticed form of pollution even in developed countries. According to Birgitta and Lindvall (1995), road traffic, jet planes, garbage trucks, construction equipment, manufacturing processes, and lawn mowers are some of the major sources of this unwanted sounds that are routinely broadcasted into the air.      EPIDE...

              INTRODUCTIONS:- Our ears are very sensitive to the small pressure fluctuations caused by sound waves. This is appropriate because sound is an integral component of the environment, and plays a very important role in our normal development and survival by providing a valuable channel of sensory-environmental contact. Often, however, sound may interfere with our activities; disturb sleep, lead to auditory or other physiologic harm, or cause irritation and annoyance . When this occurs, sound is generally unwanted or undesirable, and is often referred as noise . Sound becomes noise only when it is physiologically or psychologically defined as unwanted. This subjective definition of noise involves intricate (complex) physiologic, emotional, and psychological responses to sound. (Burns, 1973; Environmental Protection Agency (EPA), 1973; kryter, 1970).              ...