Windows doesn't use db for volume control, a db is a logarithmic ratio to the power of 10.
Maybe this will help to suit your audio preferences and acoustic surroundings.
At the bottom right of your screen you will see a (if enabled) a speaker icon.
Double click > Opens the Volume slide 0-100%
Right click on the volume icon has 5 user options of which 2 may be of interest to you?.
1 Is volume mixer for device speakers, and apps system sounds.
2 Right click volume icon and click on "Troubleshoot Sound Problems" > (You have to have Admin privileges) > Select the radio button for speakers or headphones and click next > click on "Open enhancements" this will take you to "Speaker Properties" At the top of properties you will see 4 tabs; General,Levels, Enhancements which includes settings for Bass Boost, Virtual Surround Sound, Room Acoustics Correction and Loudness Equalization and an Advanced tab.