| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a reproduction sound which is rich in reality and close to an actual sound by accurately collecting the sound of a percussion instrument, specially, a bass drum and obtaining an electrical signal which resembles the actually heard low-pitched sound. <P>SOLUTION: A diaphragm 3 is spread at an open end of a shell 2 which is cylindrically formed and electroacoustic transducers 8 and 23 are arranged in the shell to obtain the low-pitched electrical signal. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
