What is the unit for attenuation coefficient?

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Multiple Choice

What is the unit for attenuation coefficient?

Explanation:
The unit for attenuation coefficient expresses how much signal is reduced per unit distance as it travels through a medium. In ultrasound, this loss is typically quantified as decibels per centimeter, because decibels directly measure attenuation over a specific length. The other options represent unrelated quantities: W/(m·K) is thermal conductivity, Hz is frequency, and Pa·s is viscosity. So dB/cm correctly denotes attenuation per unit length.

The unit for attenuation coefficient expresses how much signal is reduced per unit distance as it travels through a medium. In ultrasound, this loss is typically quantified as decibels per centimeter, because decibels directly measure attenuation over a specific length. The other options represent unrelated quantities: W/(m·K) is thermal conductivity, Hz is frequency, and Pa·s is viscosity. So dB/cm correctly denotes attenuation per unit length.

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