The acoustic impedance of some muscle tissue is 1.70 kg/m2⋅s, and the acoustic impedance of some bone in contact with the muscle is 7.80 kg/m2⋅s. Sound waves travel through the muscle, are incident on the bone surface, and reflect from it. Find the ratio of the reflected sound wave intensity to the incident sound intensity. Answer to two decimal places.
Which of the following formulas correctly relates , the speed of sound in a medium, , the density of a medium, and , the acoustic impedance of a medium?
Ultrasonic-frequency sound waves are used in medical imaging. Ultrasonic emitters are placed in contact with irregularly shaped body parts, leaving small air gaps between the emitter and the body part. Which of the following correctly explains why using ultrasonic frequency sound waves to measure reflected sound from body parts requires a coupling medium between the source of the sound waves and the body parts?