1Damping or attenuation; the gradual weakening or decay of strength. In physics, refers to decrease of signals, amplitudes, etc.
音波は距離が離れると急速に減衰する。
Sound waves attenuate rapidly as distance increases.
景気の回復は予想より遅く、勢いが減衰した。
The economic recovery was slower than expected and its momentum waned.
回路では信号の減衰を補うためにアンプを使う。
In circuits, amplifiers are used to compensate for signal attenuation.