Q) A parallel beam of ultrasound waves of intensity (E), incident Perpendicular to muscle tissue with a thickness of (3.4 cm) (2) What is the percentage of the wave that is reflected at the boundary of muscle tissue and bone? (b) What is the percentage of the wave that passes through 3.4 cm of muscle tissue? acoustic impedance Agglutination coefficient /kg.m². s-1 /m.1 dem 3 on 6.4x106 130 E 1.7x106 23 (a) 33% (b) 45% (a) 45% (b) 33% (a) 33% (b) 67% (a) 67% (b) 33% (a) 45% (b) 55% (a) 55% (b) 45% fabric muscular bone

Sound with a 29 cm wavelength travels rightward from a source and through a tube that consists of a straight portion and a half-circle.  Part of the soundwave travels through the circle and rejoins the the rest of the wave which goes directly through the straight portion.  This rejoining results in interference.  What is the smallest radius r  (in cm) that results in an intensity minimum at the detector.  The maximum destructive interference will occur when the difference in the distance travelled by the two waves is 1/2 of a wavelength.  To solve this problem express the difference in the distance travelled by the two waves as a function of r and set this amount equal to 1/2 of a wavelength.

An interface is formed between a block of aluminium (with an acoustic impedance of 1.8 x 107 kg m2 s') and a block of copper (with an acoustic impedance of 4.6 x 107 kg m-2 s-1). Longitudinal sound waves travelling through the aluminium are normally incident on the boundary, and are partially reflected. a) What is the ratio of the amplitude of the reflected wave to that of the incident wave? Number b) What is the ratio of the amplitude of the transmitted wave to that of the incident wave? Number c) What percentage of the incident power is transmitted? Number d) What percentage of the incident power is reflected? Number % Ouit P Sove Questi

A dolphin uses echo location to track a fish in the ocean. The speed of sound in the ocean is 1470 m/sec and it takes 0.500 seconds for the sound wave to echo back to the dolphin. How far away is the fish?