Anything that increases attenuation will increase the ______.

Anything that increases attenuation will increase the ______.

• A. Penetration depth
• B. Attenuation coefficient
• C. Speed of sound
• D. Acoustic impedance

Answer: (B)

Attenuation is the loss of wave amplitude as it travels through a medium, caused by absorption, scattering, and other mechanisms. The attenuation coefficient quantifies that loss per unit distance (and often per unit frequency). So when something increases attenuation, it increases the rate at which the wave weakens, meaning the attenuation coefficient goes up. Penetration depth would actually decrease with more attenuation, since the wave can’t travel as far before it’s diminished to the threshold. Speed of sound and acoustic impedance are properties of the medium that aren’t directly increased by higher attenuation.

Attenuation is the loss of wave amplitude as it travels through a medium, caused by absorption, scattering, and other mechanisms. The attenuation coefficient quantifies that loss per unit distance (and often per unit frequency). So when something increases attenuation, it increases the rate at which the wave weakens, meaning the attenuation coefficient goes up. Penetration depth would actually decrease with more attenuation, since the wave can’t travel as far before it’s diminished to the threshold. Speed of sound and acoustic impedance are properties of the medium that aren’t directly increased by higher attenuation.