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10-15 (Speech Perception)

10-15 (Speech Perception) - o Speech sounds result from a...

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Speech Perception Praat.org – download software (for speech perception) Humans are capable of producing lots of different speech sounds: o 5000 languages spoken today, utilizing over 850 different speech sounds o Any one language uses from ~11-60 sounds o English uses about 45 sounds Speech comprises both periodic (vowels) and aperiodic (consonants) sound energy o ~85% periodic sound/~15% aperiodic sound Respiration o Where the power, source, and energy for powering speech comes from o Lungs pushing it up from the trachea to the larynx Phonation o Vibration (opening and closing) of vocal folds Articulation o Movement of our teeth or lips to produce sound Source filter model of speech production (vowels)
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Unformatted text preview: o Speech sounds result from a combination of a source of periodic sound energy (larynx) and an acoustic filter (the supralaryngeal vocal tract) o The filter modulates the laryngeal signal, amplifying • Sounds are produced by a combination of a source and a filter o Suggests that we can have different kinds of sources, but have the same filter If for some reason a person has lost a larynx, we can give them an artificial larynx (electrolarynx) which will province vibrated sound energy… moving mouth and lips will shape these sounds Electrolarynx - that device only works at one frequency… thus, you can’t adjust the pitch...
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