| 摘要 |
Method for delivering messages, where at least one message is first recorded on the storage member of a sound recorder and reproducer, whereafter the message is replayed by means of the reproducer each time as a detection pulse is received from the detector placed in the vicinity of a predetermined location and the sound reproducer is switched on on the basis of the said detection pulse and the message recorded on the storage member is replayed and made audible through a loudspeaker. The invention is characterized in that the recording stage, immediately before each message (S1, S2, S3), on the storage member (N) there is recorded a short sound signal (A, B, C) and that after the message there is arranged a pause (T1, T2, T3) of a defined duration and that at the replay stage, when a detection pulse is received from the detector, the sound reproducer is switched on and the message replay is started, the volume of the signal recorded on the storage member is supervised and the sound reproducer is switched off immediately after the short sound signal (A, B, C) is detected after the said pause (T1, T2, T3), in which case the apparatus is ready to replay the message (S1, S2, S3) immediately after another detection pulse is received from the detector, whereafter the above described stages for replaying the message are repeated. The invention also relates to an apparatus for realizing the method. |
