loadingPressure Field
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Enclosure
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Sound Fields
LpNearfieldFar fieldFree fieldReverberant field6 dBA12 ×A1Distance, rBA 7666-11, 22860512/2
Directivity Index
Source LocationDirectivityFactor124DirectivityIndex, dB036L = Lp+ 6 dB 89L = Lp+ 9 dB L = LpL = Lp+ 3 dB Free fieldOn a flat planeAt a junction of two planesAt a junction of three planesBA 7666-11, 23
Pressure Increase at Walls
Lp L = Lp+ 6 dB L = Lp+ 3 dB BA 7666-11, 24
Basic Concepts of Sound
Contents:DefinitionsdB ConversionSound FieldsdB ±dBBA 7666-11, 25