Clinical pneumatic artificial larynx: Sonics evaluation by computer
- VernacularTitle:气动式人工喉临床应用及计算机声学效果测试
- Author:
Bo LIU
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2007;0(13):-
- CountryChina
- Language:Chinese
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Abstract:
8 m. Class Ⅱ: phonation time 6-9 s, and 6-9 syllables; clear pronunciation, fluent expression, audible distance 5 m. Class Ⅲ: phonation time 80 dB was regarded as normal. ③Language diagram: Normal vowels were characterized by sine harmonic wave, even and regular flow mark, clear first and second resonance peaks and little noise in high frequency area above 4 000 Hz. RESULTS: All 60 patients were included in final analysis. ①After professional instruction and training, 39 cases reached the class Ⅰ, 14 reached class Ⅱ, and only 7 was at class Ⅲ. ②The maximum mean sound intensity was 85.5 dB. ③The language diagram characteristics of the patients was similar to healthy persons. The sound energy predominantly located at low and medium frequency areas, and gradually decreased in high frequency area. CONCLUSION: The pneumatic artificial larynx is characterized by simple operation, clear speech, nearly normal sound intensity, tone, and tone color. It is worthy of extensive application in clinic.
