Acoustical properties of fabrics in low-intensity ultrasound

In utilizing ultrasound to aid in the wet processing (dyeing and washing) of fabrics, it is important to know an effective way of introducing 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 imp...

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Bibliographic Details
Published in:Applied acoustics 1996-04, Vol.47 (4), p.345-350
Main Authors: Datar, G.V., Banks-Lee, P., Grady, P.L.
Format: Article
Language:English
Subjects:
Acoustical measurements and instrumentation
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
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Summary:In utilizing ultrasound to aid in the wet processing (dyeing and washing) of fabrics, it is important to know an effective way of introducing 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. Previous research showed that fabrics transmit less than 4% of incident energy and have negligible absorption of high-intensity ultrasound. The transmission results show a great deal of scatter due to uncontrollable causes. Also, there is no standard method to quantify reflection when high-intensity ultrasound is used. This paper investigates the acoustical properties of fabrics in low-intensity ultrasound. These results are then compared with those obtained for high-intensity ultrasound. Tests showed that fabrics transmit about 15% and reflect about 50% of the low-intensity ultrasound. However, when thoroughly wetted, fabrics transmit 100% low-intensity ultrasound.
ISSN:0003-682X
1872-910X
DOI:10.1016/0003-682X(95)00044-A