Attenuation is reported as which type of change?

Attenuation is reported as which type of change?

• A. Relative change
• B. Absolute change
• C. Neither
• D. Both relative and absolute

Answer: (A)

Attenuation describes how much of the original signal is lost compared to its starting level. It’s naturally a ratio or percent of the input, so it represents a relative change rather than a fixed, absolute amount. In practice you’ll see attenuation expressed as a ratio like Vout/Vin or Pout/Pin, or in decibels, all of which quantify the drop relative to the input. For example, a drop from 1 V to 0.7 V is an absolute difference of 0.3 V, but the attenuation is 0.7 (about -3.1 dB), a relative measure. Therefore, attenuation is reported as a relative change.

Attenuation describes how much of the original signal is lost compared to its starting level. It’s naturally a ratio or percent of the input, so it represents a relative change rather than a fixed, absolute amount. In practice you’ll see attenuation expressed as a ratio like Vout/Vin or Pout/Pin, or in decibels, all of which quantify the drop relative to the input. For example, a drop from 1 V to 0.7 V is an absolute difference of 0.3 V, but the attenuation is 0.7 (about -3.1 dB), a relative measure. Therefore, attenuation is reported as a relative change.