AM Sensitivity
The weakest AM radio signal that meets a specified reception-quality criterion under stated antenna and measurement conditions.
AM sensitivity describes the signal needed for usable medium-wave reception. Lower values indicate greater sensitivity only with equivalent units and test conditions. “Usable” refers to a specified noise or other quality threshold, rather than perfectly clear sound.
AM Sensitivity — Tuner
For a tuner, check whether the figure measures voltage at an external antenna terminal, in µV, or field strength at a loop or ferrite antenna, in µV/m or dBµV/m. These describe different test arrangements; terminal voltage cannot be directly compared with field strength.
Compare the same antenna arrangement and quality criterion, such as 20 dB signal-to-noise ratio. Keep any stated limit with its number. Better sensitivity can help with weak stations, but local interference, antenna placement and the signal reaching your home still affect reception.