Data and Drawings
From here, you can view & download useful acoustic reference and sample drawings.
A Scale Reading
When it is desired to convert a set of octave band Sound Pressure Levels into an equivalent A scale reading, apply the following corrections to the octave band SPL values.
dBA of some common sounds
Typical average decibel levels (dBA) of some common sounds.
Addition of Decibels
Decibels are logrithmic values and cannot be added by normal algebraic addition. The following is a simple method for adding decibels.
Avon Gas Turbine Package
RB11 Gas Turbine Package
GAIL India RB211 Pipeline Package
Process Gas Silencer
Micro-turbine Exhaust System
Noise-sensitive Gas Turbine Package
38dBA@100m including Pure Tone Gas Turbine Package