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WordNet
threshold level

n. the intensity level that is just barely perceptible

Usage examples of "threshold level".

But if an AI were below a certain threshold level of complexity, or lacked the sort of neural-network architecture with which an organic Vulcan brain could resonate, there was simply nothing comprehensible to read.

Once the mass of a protostar reached a threshold level, it would ignite in a fusion reaction that would generate a fierce stellar wind, to blow away the remnants of the nursery nebula.

Each nerve fiber has its own threshold level, depending on its diameter, for one thing.

Above a threshold level of radiation input, the geochemical and biochemical cycles that had maintained the temperature of Earth would be overwhelmed.

But each individual's threshold level for release of those chemicals is very different, nor are the amounts the same—.

Then a null experiment -- to verify your threshold level on each detector.

Then a null experiment--to verify your threshold level on each detector.