phonautograph

== English == === Etymology === From phono- + auto- + -graph. === Pronunciation === (Received Pronunciation) IPA(key): /fənɔːtəɡɹɑːf/ (General American) (US, without the cot–caught merger) IPA(key): /fənɔtəɡɹæf/ (cot–caught merger) IPA(key): /fənɑtəɡɹæf/ === Noun === phonautograph (plural phonautographs) (historical) A device for recording sound vibrations in a visible form.