In: Physics
Ultrasound probe emitting sound with wave length of 70 mm in air (sound speed 343 m/s) is used for probing a muscle tissue (sound speed 1500 m/s). What are the smallest features in air and the muscle tissue that can be seen with this device?
As, wavelength = speed/frequency
Here, frequency = 343/0.07
= 4900 Hz
Thus, the smallest features in air = 1500/4900
= 0.3061 m
= 306.12 mm