Lecture 1 - Speech Acoustics Overview Spectral analysis...

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Speech Acoustics ± Spectral analysis ± Spectra of consonants and vowels ± Speech spectrogram ± Acoustic phonetics Overview Speech Acoustics ± Breaks down a complex sound waveform into the sum of sinusoidal oscillations and represents each oscillation in terms of its frequency and amplitude. Spectral Analysis Speech Acoustics ± Speech is complex. ± Function of the ear is to analyze frequency. ± Needed to understand speech recognition and production Why Spectral Analysis? Amplitude Spectrum 0 -A 1 Time, ms 0 Amplitude Frequency, Hz 0 Amplitude 0 +A +A 1000 Time Waveform Amplitude Spectrum Amplitude Spectrum 0 1 Time, ms 0 Amplitude Frequency, Hz 0 Amplitude 0 -A +A +A 1000 Time Waveform Amplitude Spectrum Amplitude Spectrum 0 1 Time, ms 0 Amplitude Frequency, Hz 0 Amplitude 0 -A +A +A 2000 Time Waveform Amplitude Spectrum
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The Theremin Scope ± Amplitude vs. Frequency ± Frequency Sweep Spectrum of Tuning Fork ± Modes of vibration ± Superposition Frequency, Hz Amplitude, dB Scope Vowels: Line Spectra ± Fundamental frequency
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This note was uploaded on 03/21/2012 for the course COM DIS 110 taught by Professor Weismer during the Fall '08 term at Wisconsin.

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Lecture 1 - Speech Acoustics Overview Spectral analysis...

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