How loud is a quiet library?
A quiet library is about 40 dB, with a typical range of 35–45 dB. Background level of a quiet reading room.
That is quieter than normal conversation (60 dB).
Can it damage your hearing?
No – 40 dB is well below the 85 dBA level at which prolonged exposure starts to risk hearing damage.
How sound level changes with distance
Decibel figures always depend on distance. For a small source in open air, every doubling of distance lowers the level by about 6 dB; indoors, reflections reduce that drop. Use the sound-vs-distance calculator to estimate the level where you are.
Sounds as loud as a quiet library
A soft whisper at about 1.5 m (5 ft).40 dBRefrigerator hum
Modern fridges are often rated 32–40 dB.50 dBModerate rainfall
Steady rain heard from outdoors under a roof.50 dBQuiet office
Typical open office with low conversation.50 dBTyping on a keyboard
Mechanical keyboards are louder than laptop keyboards.
More recordings elsewhere
- Library ambience by xkeril – CC0 1.0 (freesound)
- Quiet library ambience by xkeril – CC0 1.0 (freesound)
- Entrance library ambience by xkeril – CC0 1.0 (freesound)
- Quiet Library Ambience by TyroneBarr – CC BY 3.0 (freesound)
- Ambience, Large Crowd, A.wav by InspectorJ – CC BY 4.0 (freesound)
Frequently asked questions
How many decibels is a quiet library?
About 40 dB, with a typical range of 35–45 dB.
Is a quiet library louder than a jet engine?
No – a jet engine at takeoff is about 140 dB at 30 m, while a quiet library is about 40 dB.
How are these levels measured?
With a sound level meter, usually A-weighted (dBA) to match human hearing. Published figures depend on distance and conditions, so treat them as typical values.