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Equivalent Sound Level for Fixed Sources

Sound intensity level is the level of the intensity of a sound relative to a reference value.

Equivalent sound level is proportional to the logarithm of the ratio between the time the source is on and the total time added to the steady-sound level.

Formula

QuantityVariable[Subscript["L", Style["eq", Italic]], "LogarithmicSoundPressure"] == Log[QuantityVariable[Subscript["t", Style["on", Italic]], "Time"]/QuantityVariable["T", "Time"]]*Quantity[10/Log[10], IndependentUnit["decibels sound pressure level"]] + QuantityVariable[Subscript["L", "s"], "LogarithmicSoundPressure"]

symbol description physical quantity
Leq equivalent sound level "LogarithmicSoundPressure"
T total time "Time"
ton time source is on "Time"
Ls steady-sound level "LogarithmicSoundPressure"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Equivalent Sound Level for Fixed Sources"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ ResourceObject["Equivalent Sound Level for Fixed Sources"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Equivalent Sound Level for Fixed Sources"], {QuantityVariable[ \!\(\*SubscriptBox[\("L"\), StyleBox["\<\"eq\"\>", StripOnInput->False, FontSlant->Italic]]\),"LogarithmicSoundPressure"] -> Quantity[65, IndependentUnit["decibels sound pressure level"]]}]
Out[3]=

Publisher Information