How are frequency and attenuation related?

How are frequency and attenuation related?

• A. Directly
• B. Inversely
• C. Not related
• D. Randomly

Answer: (A)

The main idea is that attenuation tends to grow with frequency in most media. As frequency increases, waves interact more with the material—there’s more absorption and more scattering—so more energy is lost per unit distance. That’s why higher-frequency signals are attenuated more, even though they may offer better resolution in some applications (like ultrasound) but at the cost of depth. So the relationship is direct: attenuation increases as frequency increases. This is not an inverse, unrelated, or random relationship, since the physical processes of absorption and scattering typically become stronger with higher frequency.

The main idea is that attenuation tends to grow with frequency in most media. As frequency increases, waves interact more with the material—there’s more absorption and more scattering—so more energy is lost per unit distance. That’s why higher-frequency signals are attenuated more, even though they may offer better resolution in some applications (like ultrasound) but at the cost of depth. So the relationship is direct: attenuation increases as frequency increases.

This is not an inverse, unrelated, or random relationship, since the physical processes of absorption and scattering typically become stronger with higher frequency.