Cambridge Audio-Visual Heart Sound Recorder No. B.M. 21402 (c. 1955) On Display:Cambridge Audio-Visual Heart Sound Recorder No. B.M. 21402 Unlike simpler electronic games of

Unlike simpler electronic games of the period

Unlike basic pocket recorders

was a massive technological breakthrough that brought digital photography to the masses by solving a major headache: how to get photos onto a computer

Engineered by George Klose and programmed by Mark Lesser

Cambridge Audio-Visual Heart Sound Recorder No. B.M. 21402 (c. 1955) On Display:Cambridge Audio-Visual Heart Sound Recorder No. B.M. 21402 Unlike simpler electronic games ofCambridge Audio Visual Heart Sound Recorder No. B. M. 21402 The Cambridge Audio Visual Heart Sound Recorder (Model B. M. 21402), produced in the mid 20th century, was a sophisticated medical workstation that allowed heart doctors to simultaneously hear and "see" the heartbeat. Housed in a polished wooden cabinet, the machine featured a built in recording disk that captured deep, low frequency heart soundsmany of which were too low for the human ear to