transmission loss
nounTransmission loss is when some of a signal, sound, or power gets weaker as it travels from one place to another.
The engineers measured the transmission loss in the fiber-optic cable to see how much signal faded over ten kilometers.
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OTHER MEANINGS
2. In acoustics, the reduction in sound level when sound passes through a wall or barrier.
The transmission loss of the new partition wall was high enough to keep the music from disturbing the neighbors.
3. In telecommunications, the decrease in signal strength as it travels along a transmission line or medium.
Rain can increase transmission loss on microwave links, so the network operators plan for extra margin.
4. In power engineering, the energy lost as heat while electricity moves through wires and transformers.
Upgrading to high-voltage lines reduced transmission loss across the regional grid.