That depends how close you measure at the door. The closer - the louder! The distance is very important if you measure with a sound pressure level meter.
Door slams typically measure around 80 to 100 decibels, depending on the force and type of door. This level of noise can be harmful to one's hearing if experienced frequently at close range.
20 decibels
207 decibels.
70-100 decibels
in what
20 to 50 decibels (dB).
85 decibels maximum.
130 decibels -140 decibels close up maybe louder though
Roughly 150-160 decibels.
50 phons (decibels) is equivalent to 2 sones.
•Sound can be measured in many ways such as decibels. There is a special machine which you can by that measures how many decibels something makes. A pin makes 10 decibels where as a loud persons or a stereo can make up to 80 decibels. Volume is measured in decibels. So Frequency is measured in hertz
a plane has 15000 decibels, there are lots maybe upto 2000000