【摘要】：目的探討聲門下壓(sub-glottal pressure,SGP)變化與離體狗喉聲音質(zhì)量變化之間的關(guān)系及非線性動(dòng)力學(xué)和擾動(dòng)分析方法在區(qū)別發(fā)聲信號(hào)中的作用。方法收集6只離體狗喉分別在SGP為2kPa和4kPa時(shí)的發(fā)聲信號(hào),分別采用非線性動(dòng)力學(xué)方法和擾動(dòng)分析方法進(jìn)行分析,比較非線性動(dòng)力學(xué)指標(biāo):相空間重構(gòu)、關(guān)聯(lián)維D2及擾動(dòng)分析方法指標(biāo):頻率微擾(jitter)、振幅微擾(shimmer)、基頻(F0)、噪諧比(NHR)對(duì)SGP變化的敏感性。結(jié)果在SGP為4kPa時(shí)離體狗喉發(fā)聲信號(hào)的相空間重構(gòu)較SGP為2kPa時(shí)復(fù)雜,在SGP為4kPa時(shí)離體狗喉發(fā)聲信號(hào)的D2和F0較SGP為2kPa時(shí)高,差異有統(tǒng)計(jì)學(xué)意義(P0.05),在SGP為4kPa時(shí)離體狗喉發(fā)聲信號(hào)的jitter、shimmer和NHR較SGP為2kPa時(shí)低,差異有統(tǒng)計(jì)學(xué)意義(P0.05);60次聲學(xué)信號(hào)中有21次因不能提取穩(wěn)定頻率無(wú)法使用擾動(dòng)方法進(jìn)行分析,其中,SGP為4kPa時(shí)16次,SGP為2kPa時(shí)5次,差異有統(tǒng)計(jì)學(xué)意義(P0.05)。結(jié)論在SGP為4kPa時(shí)離體狗喉的聲音質(zhì)量較SGP為2kPa時(shí)更好;離體狗喉發(fā)聲信號(hào)的不規(guī)則性與SGP大小有關(guān);非線性動(dòng)力學(xué)方法分析聲學(xué)信號(hào)較擾動(dòng)方法更具敏感性。
[Abstract]:Objective to investigate the relationship between the variation of subglottic pressure (sub-glottal pressure,SGP) and the sound quality of dog larynx in vitro and the role of nonlinear dynamics and perturbation analysis in distinguishing sound signals. Methods the vocal signals of 6 dogs' throats with SGP as 2kPa and 4kPa were collected and analyzed by nonlinear dynamic method and perturbation analysis method respectively. The nonlinear dynamic indexes were compared: phase space reconstruction. Correlation dimension D2 and perturbation analysis index: the sensitivity of frequency perturbation (jitter), amplitude perturbation (shimmer), fundamental frequency (F0), noise harmonic ratio (NHR) to SGP changes. Results when SGP was 4kPa, the phase space reconstruction of vocal signal in isolated dog larynx was more complicated than that when SGP was 2kPa, and the D 2 and F 0 of in vitro voice signal of dog larynx with SGP as 4kPa were significantly higher than those with SGP 2kPa (P0.05). When SGP was 4kPa, the jitter,shimmer and NHR of isolated dog larynx were lower than that of SGP with 2kPa (P0.05). Among the 60 acoustic signals, 21 times could not be analyzed by perturbation method because they could not extract stable frequency. Among them, SGP was 4kPa 16 times, SGP was 2kPa 5 times, the difference was statistically significant (P0.05). Conclusion the sound quality of isolated dog larynx is better when SGP is 4kPa than when SGP is 2kPa, the irregularity of vocal signal in isolated dog larynx is related to the size of SGP, and the nonlinear dynamic method is more sensitive than the perturbation method in analyzing acoustic signal.
【作者單位】： 廈門大學(xué)附屬中山醫(yī)院耳鼻咽喉-頭頸外科;廈門大學(xué)海洋與地球?qū)W院;復(fù)旦大學(xué)附屬眼耳鼻喉醫(yī)院;
【基金】：國(guó)家自然科學(xué)基金(81371080,NSF11174240) 廈門市科技局社會(huì)科技研究面上項(xiàng)目(3502220124035)聯(lián)合資助
【分類號(hào)】：R767

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