Technical term in computing and engineering for the reduction in strength of a signal or data.
このケーブルは減衰量が大きいので、長距離には向かない。
This cable has high attenuation, so it is not suitable for long distances.
フィルタの減衰量を測定する。
Measure the attenuation of the filter.
return loss
Compound of 減衰 (attenuation, damping) and 量 (amount, quantity).