Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 18, 2024
Abnormal sound generated during vehicle running situation is one of the important information for driving safety, hence the inspection is generally carried out at the final stage of vehicle manufacturing inspection process. For the reduction of the inspectors’ load and carrying out stable inspection, automatic abnormal sound inspection method is essential. On the other hand, there are various kinds of standard noise generated at the situation such as road noise in case an abnormal sound is generated at general driving condition. In this situation, detecting the abnormal sound becomes difficult. In this study, an automatic abnormal sound detection method using two (left and right side) microphones in noisy condition is proposed. In the method, one of two microphones is used for the reduction of the standard noise and existence of abnormal sound is evaluated by using similarity of a lot of noise decreased sounds. In addition, an estimation method for indicating the abnormal sound direction is also considered by comparing the standard noise decreased sound at left and right side in case the abnormal sound is detected.
