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Hearing & Deafness (5)

Hearing & Deafness (5). Timbre, Music & Speech. Vocal Tract. Source & Filter. Larynx. Vocal tract. Output sound. Pitch and Formants. 1. Harmonics (giving pitch) produced by vocal cord vibration. 2. Formant frequencies: resonances of the vocal tract.

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Hearing & Deafness (5)

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  1. Hearing & Deafness (5) Timbre, Music & Speech

  2. Vocal Tract

  3. Source & Filter Larynx Vocal tract Output sound

  4. Pitch and Formants 1. Harmonics (giving pitch) produced by vocal cord vibration 2. Formant frequencies: resonances of the vocal tract 3. Formant frequencies change as you change the shape of your vocal tract

  5. Vowel production

  6. Tuvan throat music

  7. Tuvan throat music - 2

  8. Vocal tract change Me (m) Shorter vocal-tract (higher formants) Higher pitch Both (-> f)

  9. SWS narrow-band spectrogram sine-wave speech

  10. Adding harmonics to make an instrument’s timbre Track 53 Different notes on clarinet and oboe

  11. What determines an instrument’s timbre 1. “formant” frequencies 2. Amplitude envelope 3. Onset / offset transients

  12. Instrument timbre does not scale - it is more like speech formants Cheap synthesisers do this to generate different notes Natural instruments and good synthesisers do this

  13. Bassoon & violin notes Track 57

  14. Forwards & backwards temporal envelopes Track 54 Track 56

  15. Onset transients 0.7817 0 ﾐ0.6922 0 0.0842 Time (s) 0.7817 0 ﾐ0.6922 0 0.0842 Time (s)

  16. Why are some intervals consonant and others dissonant? Consonant musical intervals form simple ratios octave 2/1 fifth 3/2 fourth 4/3 major third 5/4 minor sixth 8/5 minor third 6/5 major sixth 5/3 major second 9/8 consonant dissonant

  17. Two complex tones separated by a perfect fifth (3:2) Consonant intervals have maximally separated component frequencies

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