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- Pattern_playback abstract "The Pattern Playback[1][2] is an early talking device that was built by Dr. Franklin S. Cooper and his colleagues, including John M. Borst and Caryl Haskins, at Haskins Laboratories in the late 1940s and completed in 1950. There were several different versions of this hardware device. Only one currently survives. The machine converts pictures of the acoustic patterns of speech in the form of a spectrogram back into sound. Using this device, Alvin Liberman, Frank Cooper, and Pierre Delattre (later joined by Katherine Safford Harris, Leigh Lisker, and others) were able to discover acoustic cues for the perception of phonetic segments (consonants and vowels). This research was fundamental to the development of modern techniques of speech synthesis, reading machines for the blind, the study of speech perception and speech recognition, and the development of the motor theory of speech perception.To create sound, the Pattern Playback uses an arc light source which is directed against a rotating disk with 50 concentric tracks whose transparencies vary systematically in order to produce 50 harmonics of a fundamental frequency. The light is further projected against a spectrogram whose reflectance corresponds to the sound pressure level of the partial of the signal, and is then directed towards a photovoltaic cell by which the light variation is converted into sound pressure variations.The Pattern Playback was last used in an experimental study by Robert Remez in 1976. The Pattern Playback now resides in the Museum at Haskins Laboratories in New Haven, Connecticut.The technique of pattern playback also now refers, more generally, to algorithms or techniques for converting spectrograms, cochleagrams, and correlograms from pictures back into sounds.".
- Pattern_playback wikiPageExternalLink patplay.html.
- Pattern_playback wikiPageExternalLink kemplne.htm.
- Pattern_playback wikiPageExternalLink Digital_Pattern_Playback.
- Pattern_playback wikiPageID "8265475".
- Pattern_playback wikiPageRevisionID "576454241".
- Pattern_playback hasPhotoCollection Pattern_playback.
- Pattern_playback subject Category:American_inventions.
- Pattern_playback subject Category:Phonetics.
- Pattern_playback subject Category:Speech_recognition.
- Pattern_playback subject Category:Speech_synthesis.
- Pattern_playback type Ability105616246.
- Pattern_playback type Abstraction100002137.
- Pattern_playback type AmericanInventions.
- Pattern_playback type Cognition100023271.
- Pattern_playback type Creativity105624700.
- Pattern_playback type Invention105633385.
- Pattern_playback type PsychologicalFeature100023100.
- Pattern_playback comment "The Pattern Playback[1][2] is an early talking device that was built by Dr. Franklin S. Cooper and his colleagues, including John M. Borst and Caryl Haskins, at Haskins Laboratories in the late 1940s and completed in 1950. There were several different versions of this hardware device. Only one currently survives. The machine converts pictures of the acoustic patterns of speech in the form of a spectrogram back into sound.".
- Pattern_playback label "Pattern playback".
- Pattern_playback sameAs m.026yb58.
- Pattern_playback sameAs Q7148386.
- Pattern_playback sameAs Q7148386.
- Pattern_playback sameAs Pattern_playback.
- Pattern_playback wasDerivedFrom Pattern_playback?oldid=576454241.
- Pattern_playback isPrimaryTopicOf Pattern_playback.