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首页> 外文学位 >New developments in speech processing: Effects on speech perception abilities in children with cochlear implants and digital hearing aids.
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New developments in speech processing: Effects on speech perception abilities in children with cochlear implants and digital hearing aids.

机译：语音处理的新进展：带有人工耳蜗和数字助听器的儿童对语音感知能力的影响。

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摘要

The aim of this study was to determine the unaided puretone average (PTA) above which a child will exhibit significantly better speech recognition with a cochlear implant than a digital hearing aid. Children with PTA's (.5, 1.0, 2.0 kHz) in the severe to profound range, wearing Digital Signal Processing (DSP) hearing aids with Wide Dynamic Range Compression (WDRC) or a Nucleus 24 or Clarion cochlear implant system, were evaluated using a speech perception test battery administered at intensity levels representative of raised and soft speech levels. Fifty-two children (age 5–15 years) participated: 26 with unaided PTA's from 60 to 98 dB HL using DSP hearing aids and 26 with pre-implant unaided PTA's from 93 to 120 dB HL using cochlear implants. Several outcome measures were obtained twice to assess test-retest reliability. The Lexical Neighborhood Test (LNT) was analyzed as the major outcome variable due to high test-retest reliability. Multiple regression with repeated measures analyses of LNT scores revealed a significant Level effect, as well as Device x Level and Device x Time interactions. The Level effect is explained by reduced audibility at 50 dB SPL. With unaided PTA as a covariate, intersection between the regression lines for the two devices was dependent upon Level and Time. The unaided PTA at which the lines intersected was 82 and 90 dB HL for a 70 dB SPL level and 85 and 68 dB HL for 50 dB SPL at time 1 and 2, respectively. For the DSP Hearing Aid Group, lower LNT scores at 50 dB SPL and Time 2 may be explained by reduced audibility caused by feedback and insufficient gain. Assuming that LNT scores at 50 dB SPL at Time 2 are representative of long-term hearing of soft incidental speech that is essential for language learning and fluent communication, the children using DSP hearing aids in this study with PTA's of 88 dB HL would be expected to have significantly higher LNT scores with a cochlear implant. These results should be further examined with research efforts focusing on early intervention with optimally fitted DSP hearing aids and cochlear implants.
机译：这项研究的目的是确定独立的纯音平均值（PTA），高于该平均值时，与数字助听器相比，使用人工耳蜗植入的儿童将表现出更好的语音识别能力。对患有严重至深远范围的PTA（.5、1.0、2.0 kHz），戴着数字信号处理（DSP）助听器，宽动态范围压缩（WDRC）或Nucleus 24或Clarion人工耳蜗系统的儿童进行了评估，语音感知测试电池以代表升高和柔和语音水平的强度水平进行管理。 52名儿童（5至15岁）参加：26名使用DSP助听器的PTA从60到98 dB HL的无辅助PTA，以及26名使用耳蜗植入的从93至120 dB HL的植入前无辅助PTA的。两次获得了几种结果指标来评估重测信度。由于重新测试的可靠性高，因此将词法邻域测试（LNT）分析为主要结果变量。通过对LNT分数进行重复测量分析的多元回归显示出显着的Level效应，以及Device x Level和Device x Time的相互作用。电平效果可以通过降低50 dB SPL的可听度来解释。使用独立的PTA作为协变量，两个设备的回归线之间的交点取决于Level和Time。对于70 dB SPL电平，线路相交的独立PTA在时间1和2分别为82和90 dB HL，对于50 dB SPL分别为85和68 dB HL。对于DSP助听器组，在50 dB SPL和时间2时LNT分数较低的原因可能是反馈引起的可听度降低和增益不足。假设在时间2时LNT分数为50 dB SPL代表长期的软附带语音听觉，这对于语言学习和流畅的交流至关重要，那么在本研究中使用DSP助听器且PTA为88 dB HL的儿童将是可预期的植入人工耳蜗的LNT分数明显更高。这些结果应通过研究工作进一步检查，这些研究工作应集中在采用最佳配合的DSP助听器和人工耳蜗的早期干预上。

著录项

  • 作者

    Davidson, Lisa Surber.;

  • 作者单位

    Washington University.;

  • 授予单位 Washington University.;
  • 学科 Health Sciences Audiology.; Health Sciences Speech Pathology.
  • 学位 Ph.D.
  • 年度 2003
  • 页码 257 p.
  • 总页数 257
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 耳科学、耳疾病;预防医学、卫生学;
  • 关键词

  • 入库时间 2022-08-17 11:45:40

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