Seven words
Click a cell: the first three lose the vowel.
or use the + on each cell
In a sentence
How the word sounds in a sentence. Tap the line to hear it all, tap the highlighted word to hear just that part.
Voiced ratio for seven words
The verdict is computed from the data (threshold 0.40), not pasted from a rule list.
| Word | Romaji | Context | Voiced ratio | Verdict |
|---|---|---|---|---|
| すき | suki | i/u between two voiceless consonants | 0.22 | devoiced |
| くつ | kutsu | same (k and ts) | 0.29 | devoiced |
| きく | kiku | both morae are i/u between voiceless sounds | 0.37 | devoiced |
| すず | suzu | u between s (voiceless) and z (voiced) | 0.54 | stays voiced |
| ふじ | fuji | u between f (voiceless) and j (voiced) | 0.65 | stays voiced |
| いぬ | inu | control: i in word-initial position before voiced n | 0.87 | stays voiced |
| あさ | asa | control: a is not a high vowel | 0.53 | stays voiced |
3 devoiced words: 0.22–0.37; 4 voiced words: 0.53–0.87. The two groups do not overlap, and 0.40 sits in the gap — that gap is the basis for the threshold.
How to practise
- すき, くつ, きく: between two voiceless consonants — do not insert a full u.
- すず, ふじ: the right neighbour is voiced (z / j), so the vowel must sound.
- いぬ: i is word-initial, so it stays.
- Rule of thumb: voiceless–high vowel–voiceless only.
Where these numbers come from
Fraction of frames Praat judges voiced inside the speech span. The 0.40 line is not hand-written: the devoicing words measure 0.22 / 0.29 / 0.37 and the others 0.53 / 0.54 / 0.65 / 0.87, so 0.40 sits in the gap.
One rule did NOT reproduce: textbooks also devoice word-final です / ます, but this synthesis reads です at 0.56 — the same band as the voiced group — so the page leaves that claim out.