| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a comfortable announcement, even in noises from a plurality of noise sources. <P>SOLUTION: A silencing system for a passenger conveyer includes a storage part (14) storing steady noise properties, intermittent noise properties, and unsteady noise properties by associating them with individual noise parameters; and a control part (10) which acquires the steady noise properties, intermittent noise properties, and unsteady noise properties separately for each individual noise parameter through a microphone 40 to store them in the storage part in advance, synthesizes the respective steady noise properties, intermittent noise properties, and unsteady noise properties taken from the storage part according to the noise parameters acquired during actual operation of the passenger conveyer to calculate specific noise, generates an inverse phase signal for silencing the calculated specific noise as a silencing signal, and outputs the silencing signal upon outputting an announcement. <P>COPYRIGHT: (C)2013,JPO&INPIT |
