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專題研究 語音訊號處理專題 助教:余典翰 指導教授:李琳山 2013/07/30. Outline Acoustics ( 聲學 ) Phonetics ( 語音學 ) Useful Tools 2.

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Presentation on theme: "專題研究 語音訊號處理專題 助教:余典翰 指導教授:李琳山 2013/07/30. Outline Acoustics ( 聲學 ) Phonetics ( 語音學 ) Useful Tools 2."— Presentation transcript:

1 專題研究 語音訊號處理專題 助教:余典翰 指導教授:李琳山 2013/07/30

2 Outline Acoustics ( 聲學 ) Phonetics ( 語音學 ) Useful Tools 2

3 Acoustics Part 1 3

4 Acoustics (1/4) Oscillogram ( 波形圖 ) Spectrogram ( 頻譜圖 ) 4

5 Acoustics (2/4) Frequency – hertz (Hz) Amplitude – decibel (dB) Phase – degree ( ∘ ) periodamplitude phase 5

6 Acoustics (3/4) F 0 (fundamental frequency 基頻 ) – property of vocal fold ( 聲帶 ) vibration – pitch ( 音高 ) fundamental period 6

7 Acoustics (4/4) F1, F2, F3… (formant frequencies 共振頻率 ) – properties of vocal tract ( 聲道 ) – phone ( 音素 ) 7 F3 F2 F1

8 Phonetics Part 2 8

9 Phonetics (1/4) Transcription – 語音符號 Articulatory phonetics (speech production) – 語音發聲 Acoustics phonetics – 語音聲學 Auditory phonetics (speech perception) – 語音聽覺 9

10 Phonetics (2/4) Vowels – Monophthong ( 單母音 ) – Diphthong ( 雙母音 ) 10

11 Phonetics (3/4) Consonants – Voiced ( 濁音 ) – Unvoiced ( 清音 ) ╳ – Plosive/Stop ( 爆破音 / 塞音 ) – Fricative ( 擦音 ) – Affricate ( 塞擦音 ) – Nasal ( 鼻音 ) 11

12 Phonetics (4/4) IPA consonants for English 12

13 Useful Tools Part 3 13

14 Useful Tools Praat – Wavesurfer – 14

15 Praat (1/6) 15

16 Praat (2/6) 16 Read from file (.wav)

17 Praat (3/6) Record mono sound (need microphone) 17

18 Praat (4/6) Record Stop Save to list 18

19 Praat (5/6) View & Edit 19

20 Praat (6/6) 20

21 Wavesurfer (1/4) 21 File/Open

22 Wavesurfer (2/4) Choose “Speech analysis” – Do NOT check “default” (next time will crash) 22

23 Wavesurfer (3/4) 23

24 Wavesurfer (4/4) Right click and create other panes you need – Ex: power plot 24

25 Summer Assignment Use praat or wavesurfer to analyze a.wav file Can you identify any phone by spectrogram? What kind of vowels or consonants are there? Can you recognize pitch and formants? Try out more functions of these tools! 25

26 Thank You Questions?


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