Definition of phonophotography in English:

phonophotography

noun

historical
  • The photographic recording of sound waves (especially those produced by speech or singing), by means of an apparatus which responds to sound vibration whilst simultaneously projecting a ray of light on to a moving photographic film.

Origin

1920s; earliest use found in Science. From phono- + photography.

Pronunciation

phonophotography

/ˌfəʊnə(ʊ)fəˈtɒɡrəfi/