As wavelength is increased (or frequency decreased) the ultrasound will penetrate deeper. As the wavelength is decreased (or frequency is increased) the ultrasound beam will have a shallower penetration. Low frequency ultrasound has superior penetration. … FrequencyWavelength (l)5 MHz0.3 mm7 MHz0.2 mmSound Wave Properties – E-Echocardiography e-echocardiography.com › page › page