The thyroid hormone is responsible for regulating the metabolic rate of every cell in the body. The action of thyroid hormone is very important in many developmental processes such as body growth and central nervous system maturation. When the thyroid gland is malfunctioning, it can affect anysystem of the body including auditory system . Thyroid disorder is a general term representing several different diseases involving the thyroid gland and increase or decrease in thyroid hormone. The two major categories in thyroid disorders are, hyperthyroidism (thyroid overactivity) and hypothyroidism (thyroid underactivity), depending on whether serum thyroid hormone levels (T4=Thyroxin and T3=Triiodothyronin) are increased or decreased, respectively. Thyroid hormone disorder may be both congenital as well as acquired. According to a projection from several studies on thyroid diseases, it has been estimated that about 42 million people in India suffer from various kind of thyroid diseases .