Al-Sarraf__'A_Study_of_Ultrasonic_Metal_Welding'_(thesis_2013).pdf
	Woo et al [49] conducted a theoretical study of an acoustic horn which was excited by high ultrasonic power. The
optimal dimensions of the horn were investigated in order to achieve high vibration. p. 20
	[49] = J. Woo, Y. Roh, K. Kang, and S. Lee, "Design and Construction of an Acoustic Horn for High Power Ultrasonic Transducers," Ultrasonics Symposium, 2006. IEEE, pp. 1922-1925, 2006.