Patent US 5,452,274

A sound-activated playback device which generally includes a sound-activated circuit and an electrically driven playback device which plays a recording on a selected prerecorded medium. The sound-activated circuit includes a noise sensor for sensing the sound of a crying child and activating the playback device. The sound-activated circuit also includes a timer for selecting and limiting the duration of playback of the recording, a timer override switch for overriding the timer, and a prerecorded medium reset for resetting the prerecorded medium after the playback device stops playing. Further, the sound-activated circuit includes a means for turning off the noise sensor until the playback device has finished playing and the prerecorded medium is reset.