What are the pros and cons of the lowest and highest frequencies

One advantage of lower frequencies is that the signals have better penetration, meaning they pass through objects such as walls with less attenuation . This effect results in better in-building penetration.5 Mar 2012

The amount of absorption depends on the frequency of the sound. A high frequency sound has many cycles in a second, and the particles in the medium are therefore vibrating very rapidly . Just as when you rub your hands together very rapidly, this produces more heat than if you rub your hands together slowly.

In general, as sounds of the same volume pass though a wall, the low bass frequencies will penetrate the wall more easily than the high frequencies . Low frequency sounds lose less energy as they pass through a solid object.

A higher frequency will have a shorter wavelength. … Smaller wavelengths are more easily reflected or refracted in the superficial tissues than longer wavelengths. As wavelength is increased (or frequency decreased) the ultrasound will penetrate deeper .7 Eyl 2021