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Speech perception Speech perception

Speech perception - PowerPoint Presentation

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Uploaded On 2015-10-14

Speech perception - PPT Presentation

Relating features of hearing to the perception of speech The bottom line The auditory system encodes the properties of sound that are essential to recognizing speech but its a lot more complicated than that ID: 160016

fine speech acoustics structure speech fine structure acoustics variability perception amplitude sound articulation acoustic envelope spectral information coming speaker multisensory important features

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Slide1

Speech perception

Relating features of hearing to the perception of speechSlide2

The bottom line

The auditory system encodes the properties of sound that are essential to recognizing speech, but it’s a lot more complicated than that.Slide3

ProductionSlide4

AcousticsSlide5

VowelsSlide6

Consonants

Laughter can soothe and healSlide7

Place and manner of articulationSlide8

Speech cuesSlide9

Important acoustic featuresSlide10

Envelope v. Spectral InformationSlide11

Fine structure: VoicingSlide12

Fine structure: Intonation contour

Marianna made the marmalade.Slide13

Fine structure: Tone

split white swing defeat

mother

high level

hemp

rising

horse

falling- rising

scold

fallingSlide14

Redundancy leads to robust perception

Frequency (Hz)

Amplitude (dB)

2100

400 Hz bandwidth

.5 1 1.5 2.0

Amplitude (dB)

.5 1 1.5 2.0

.5 1 1.5 2.0

1 Hz

4 Hz

64 Hz

Interrupted

FilteredSlide15

Variability in acoustics: Co-articulationSlide16

Variability in acoustics: Speaker

Winnfield, LA

Vancouver, BC

Brooklyn, NYSlide17

Variability in acoustics: Top-down influences

another thing coming OR another think coming?Slide18

Multisensory integrationSlide19

Conclusions

Speech is produced by spectral and temporal modifications (by articulators) of a vibrating source (vocal folds).

The amplitude spectrum and the envelope of sound carry much of the information in speech. The fine structure contributes to pitch-related aspects of speech.

Sound associated with a phoneme is influenced by preceding and following phonemes, by the speaker, and by many other factors.

Speech is highly resistant to corruption and interference.

Acoustic and semantic context important in speech recognition.

Speech is a multisensory phenomenon.