Subjective Effect of Change in Sound Pressure Level

Changing sound pressure level and subjective human perception

There are variations in the individual perception of strength of sound.

Studies have shown that in general the sound is perceived twice as loud if the sound level is increased by 10 dB. Similarly - a 20 dB increase in the sound pressure level is perceived as four times as loud by a normal human hearer.

Sound AwarenessChange in Sound Pressure
(dB)
Insignificant 1
Just perceptible 3
Clearly noticeable 5
Twice or half as loud 10
Significant 15
Much louder or quieter, four times as loud 20

Related Topics

  • Acoustics - Room acoustics and acoustic properties - decibel A, B and C - Noise Rating (NR) curves, sound transmission, sound pressure, sound intensity and sound attenuation

Related Documents

Tag Search

Search the Engineering ToolBox

- "the most efficient way to navigate!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close