PUBLICCADDRESS TRANSFER METHOD AND ITS PUBLICCADDRESS DEVICE

摘要

PURPOSE:To enable a real sound to be heard clearly without causing disturbance due to the echo of a reflected sound, by adding a delay sound to the read sound emitted from a loudspeaker. CONSTITUTION:A sound signal sent from sound signal generator 1 is amplified by voltage amplifier 3 and power amplifier 4 and emitted from loudspeaker 2. In this case, delay circuit 5 is interposed between amplifiers 3 and 4 in parallel so as to apply the real sound to mixing circuit 6 with a time lag between 10 and 50msec, so that the read sound and delay sound will be continuously emitted from loudspeaker 2. Thus, the disturbance of a reflected sound is eliminated and the real sound can be heard clearly.