Comparison of noise levels and predicted detectability in ATL3 for stars with and without seismic detections. Left: correspondence between the global asteroseismic ν_max parameters and the high-frequency PSD noise level for stars with positive seismic detections in blue, for stars identified as classical pulsators (e.g. δ Sct/γ dor), in red, and for stars without a seismic detection, in green. The ν_max and colouring of the non-detection cases are given by the ν_max and detection probability (P_det) returned by the ATL3 (Hey et al. 2024), and except for a few cases, we only include stars with P_det > 50%. The non-detection ν_max values have been offset (horizontal line indicates the offset from the original position) by increasing ν_max by 16%, corresponding to the apparent overall bias of the ATL3 values, as seen from Fig. 6. Stars with a noise level above 20 ppm²/μHz have been offset to this value (dotted line). The coloured lines give the median binned noise levels of stars with (blue) and without (green) detections against ν_max. Right: correspondence between the maximum ATL3 P_det (for either 20- or 120-s cadence) against ν_max, with the same colouring and ν_max as in the left panel. Stars with a P_det below 50% have been offset to this value (dotted line). For the stars with seismic detection (blue), we indicate with small horizontal lines the ATL3 predicted ν_max.