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Home arrow Resources arrow ASHRAE Glossary
Glossary

 

The terms and definitions included in this glossary were taken from "ASHRAE Terminology of Heating, Ventilation, Air Conditioning & Refrigeration".
To access the complete glossary please visit ASHRAE's Bookstore.


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sound power level Lw


airborne power measured in decibels. It is the base 10 logarithm of the source power output w, multiplied by 10, and referenced at 10-12 W (1 pW). Or:
Lw = 10 log(w/10-12) = 10 log w + 120 dB

 

 

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