发明名称 SOUND SYNTHESIZING METHOD AND APPARATUS
摘要 A sound synthesizing method and apparatus for producing synthesized sounds having a property similar to the property of natural sounds emitted from a natural acoustic tube having a variable cross-sectional area. The natural acoustic tube is replaced by a series connection of a plurality of acoustic tubes each having a variable cross-sectional area. The acoustic tube series connection is replaced by an equivalent electric circuit connected between a power source circuit and a sound radiation circuit. The equivalent electric circuit includes a parallel connection of first and second electric circuits equivalent for adjacent first and second acoustic tubes of the acoustic tube series connection. The first electric circuit includes input and output side sections each including a propagated current source and a surge impedance element having a surge impedance inversely proportional to the cross-sectional area of the first acoustic tube. The second electric circuit includes input and output side sections each including a propagated current source and a surge impedance element having a surge impedance inversely proportional to the cross-sectional area of the second acoustic tube. A value for the current flowing in the radiation circuit is calculated to produce a synthesized sound component corresponding to the calculated value. Thereafter, similar calculations are repeated at uniform time intervals to produce a synthesized sound.
申请公布号 EP0287104(B1) 申请公布日期 1991.12.18
申请号 EP19880105993 申请日期 1988.04.14
申请人 MEIDENSHA KABUSHIKI KAISHA 发明人 SUDA, NORIO;SUZUKI, TAKAHIRO
分类号 G10L25/00 主分类号 G10L25/00
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