fundamentalsofacoustics(16)聲學(xué)基礎(chǔ)英文版教學(xué)課件(參考版)
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【正文】 3113 sound waves travel in the cylindrical cavity ? From the wave equation 22202 1tpc ????0)(11 202222222?????????????pcprzptprrp ??c o s c o s( ) ( ) ( )s in s inz m rp k z m R k r??)()( rkBNrkAJR rmrmm ??22rzk k k??0zu ?0ru ?z=0, z=l r=a B=0 000c o s ( ) c o s jtrzmp p m J r z ecc??????0)( cln zz?? ?0()mnr ca??? ?mn??0)( ?? armdrdJ00 01 020 , 7, 0? ? ?? ? ?01013 .8 3 2kaa????027 .0 1 5ka?220, ( ) ( )2zmnzn m nzc nfla???02mnmncfa??0 1 0 010 0 .5 822ccffaa?? ? ?is the solutions of zwhe n l ??0 0 1 01 1 .2 222occffaa?? ? ?0 0 0 1( , ) c o s ( )jtzznp p J k r z el???0 0 1 03 . 8 3 2( , ) ( )J k r J ra?000, (3 .8 3 2 ) ( )0 , ( 0 ) 1 ( )2 .4 9, ( 2 .5 ) 03 .8 3f o r r a JrJr a J? ? ?? ? ???? ?????? kr0()J kr?? ?? ? ?? ? ?0 aarz000, (3 .8 3 2 ) ( )0 , ( 0 ) 1 ( )2 .4 9, ( 2 .5 ) 03 .8 3f o r r a JrJr a J? ? ?? ? ???)c os ( zlnzz???2)12( ?? nzlnzz( 2 1 )2zzlnzn???? ?
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