公开(公告)号：US3563229A

公开(公告)日：1971-02-16

申请号：US3563229D

申请日：1967-10-25

Applicant: ERICSSON TELEFON AB L M

Inventor： PETRUSSON ERLING OLAV VALDEMAR

IPC: A61B5/0402 ,  A61M21/00 ,  A63H3/00 ,  H03K3/282 ,  A61B19/00

CPC classification number: A63H3/001 ,  A61B5/04021 ,  A61M21/00 ,  A61M2021/0027 ,  A61M2021/0061 ,  A63H3/003 ,  H03K3/2823

Abstract: Incorporated within a toy is a cardiac sound simulator. The simulator comprises a pulse generator which generates pulses in pairs. The time between the pulses in each pair being less than the time between pairs and the two pulses of a pair having different time durations. The pulses are fed to a loudspeaker which converts the pulses to a sound having the rhythm of a heartbeat.