Click a brand button ⟶ instant sample. Or drag the slider (0 – 80 dB) to fine‑tune.
Tip: set your PC / phone volume where you usually watch a quiet movie, then compare.
30 dB ≈ library • 40 dB ≈ quiet office • 50 dB ≈ normal split‑AC fan
These are relative dB levels; calibrate once with a phone SPL app if you need true sound‑pressure.