The field of ultrasonics is still making strides towards perfection, but already many applications of ultrasonic energy have been found in science and technology. Ultrasonics is the science of sound waves above the limits of human audibility. The aim of this study was to investigate the effects of ultrasound on textile pretreatment processes especially on enzymatic processes. Use of enzymes in the textile industry has become more popular in recent years. Although enzymatic processing offers many advantages, there are a few drawbacks when compared to traditional methods, namely, expensive processing costs and relatively slow reaction rates. Introducing ultrasonic energy during enzymatic treatment Of cotton fabric significantly improves enzyme efficiency without affecting the strength of the fabric.