| 摘要 |
PROBLEM TO BE SOLVED: To acquire operating noise that is generated accompanied by the operation of an operating means, accurately without requiring a quiet environmental space. SOLUTION: The driving of a zoom motor is started (S103), sound recording is started, and ambient sound data constituted of operating noise that is generated accompanied by the rotation of the zoom motor, and various kinds of noise in a plant inputted from a microphone are sequentially recorded (S104). If first to fourth ambient sound data inputted from the microphone are stored, in addition processing (S115), the first to fourth ambient sound data are added. The added ambient sound data obtained in the addition processing are divided with the number of times of addition processing (S116). In such a case, when only the operating noise is concerned in the added ambient sound data, the amplitude of the operating noise in the added ambient sound data becomes four times. Therefore, by dividing this amplitude with "4", operating noise data similar to the case of acquisition with N=1-4 can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI |
