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Traditionally, jitter, shimmer, and harmonic noise ratio (HNR) have been used as indicators of periodic disturbances in voice. Whereas shimmer measures fluctuations in voice loudness, jitter measures fluctuations in voice pitch, which are affected by vocal fold tension and stiffness. HNR is an indicator of the stability of the harmonic structure and indicates the degree of voice disturbance, especially hoarseness. Figure 7.1 shows a schematic of the jitter and the shimmer. Jitter is a measure of how much each period Ti varies, and shimmer is a measure of how much each amplitude Ai varies. If perfectly periodic, both the jitter and shimmer would be zero.

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Depression: Jitter, Shimmer, Harmonic to Noise Ratio, and Pitch Rate

  • 章节

  • 发表日期：

    2025年

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  • Shuji Shinohara

摘要

Traditionally, jitter, shimmer, and harmonic noise ratio (HNR) have been used as indicators of periodic disturbances in voice. Whereas shimmer measures fluctuations in voice loudness, jitter measures fluctuations in voice pitch, which are affected by vocal fold tension and stiffness. HNR is an indicator of the stability of the harmonic structure and indicates the degree of voice disturbance, especially hoarseness. Figure 7.1 shows a schematic of the jitter and the shimmer. Jitter is a measure of how much each period Ti varies, and shimmer is a measure of how much each amplitude Ai varies. If perfectly periodic, both the jitter and shimmer would be zero.