| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for transmitting alarm tone capable of efficiently transferring alarm to more persons.SOLUTION: In a method for transmitting alarm tone having a sweep sound phrase in which a frequency changes with an elapse of time, a change range of a frequency has a plurality of different sweep sound phrases, a set obtained by arranging the plurality of sweep sound phrases in a predetermined order is set so as to be repeated, and a change rate of the frequency is made constant in each sweep sound phrase. |
