Pressure Field
??Loudspeaker??
Enclosure
??MicrophoneBA 7666-11, 21
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
声学基本概念 - 图文
PressureField??Loudspeaker??Enclosure??MicrophoneBA7666-11,21SoundFieldsLpNearfieldFarfieldFreefieldReverberantfield6dBA12×A1Distance,rBA7666-11,22860
推荐度：
点击下载文档文档为doc格式
