Introduction to Speech Perception

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10 Terms

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Speech Perception

The process of understanding spoken language; more complex than it appears due to automatic brain processing.

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Co-articulation

The influence of adjacent sounds on one another during speech production, contributing to acoustic variability.

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Source Filter Theory

A model describing speech production as involving a sound source (vocal cords) and a filter (vocal tract) that shapes the sounds.

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Phoneme

The smallest unit of speech that conveys meaning; changing one phoneme can change the word's meaning.

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Spectrogram

A visual representation of the spectrum of frequencies in a sound signal as they vary with time.

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Formants

Distinct frequency bands of energy in speech, crucial for differentiating vowel and consonant sounds.

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Categorical Perception

The phenomenon where perceivable sounds are classified into distinct categories rather than being perceived continuously.

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The Now or Never Bottleneck

The challenge of processing speech in real time, where previous sounds must be understood before new sounds overwrite them.

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McGurk Effect

A perceptual phenomenon where conflicting visual and auditory stimuli lead to a combination of the perceived sounds.

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Acoustic Variability

The differences in acoustic signal even when the same speech sounds are produced, influenced by speaker differences and context.