In utilizing ultrasound to aid in wet processing (dyeing and washing) of fabrics, it is important to know an effective way to introduce the ultrasound to the fabric. The process of increasing dye transfer from the dye bath to the fabric using ultrasonic energy is a function of the acoustic impedance characteristics of the fabrics. A large acoustic impedance mismatch between the dye bath and the fabric implies that the ultrasound is not able to penetrate the fabric. This means that multiple layers of fabric could not be processed in an ultrasound tank without supplying ultrasound to both sides of the fabric. Hence, knowing the reflection, absorption and transmission of the ultrasonic energy at the fabric-water interface will help in determining the fabric processability. There is no published literature on this problem. The purpose of the research presented here is to gain better insight into this interaction. The work shown here is restricted to only the transmission and absorption of high intensity ultrasound through fabrics.
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