谐频掩蔽噪声阈值。

Noise thresholds in harmonic series maskers.

机构信息

School of Audiology and Speech Sciences, The University of British Columbia, 2177 Wesbrook Mall, Vancouver, British Columbia, V6T 1Z3, Canada.

出版信息

J Acoust Soc Am. 2021 Apr;149(4):2492. doi: 10.1121/10.0004130.

DOI:10.1121/10.0004130

PMID:33940897

Abstract

The presence of noise is a salient cue to the perception of breathiness and aspiration in speech sounds. The detection of noise within harmonic series (maskers) composed of unresolved components was found to depend on the fundamental frequency (f) and the overall level of the masker [Gockel, Moore, and Patterson (2002). J. Acoust. Soc. Am., 111 (6), 2759-2770]. In the present study, noise detection thresholds were measured as a function of the frequency range, the f, and the overall level of harmonic maskers. Frequency range was specified in equivalent rectangular bandwidth (ERB) units (3-13, 13-23, 23-33, or 3-33 ERBs). The results were consistent with the idea that listeners rely on spectral cues when maskers comprise only resolved components (3-13 ERBs), and on temporal (dip listening) cues when maskers contain only unresolved components (23-33 ERBs). Noise detection thresholds were generally lower when masker level was high (70 dBA) than when it was low (50 dBA). Masker f affected thresholds only when listeners relied on spectral cues for noise detection. With the wideband (3-33 ERBs) masker, listeners likely detected noise by focusing on the frequency band (23-33 ERBs) with the most advantageous noise-to-harmonic ratio.

摘要

噪声的存在是语音中呼吸声和送气音感知的显著线索。在由未解析成分组成的谐波系列（掩蔽器）中检测噪声的发现取决于基频 (f) 和掩蔽器的总水平[Gockel、Moore 和 Patterson（2002）。J. Acoust. Soc. Am.，111（6），2759-2770]。在本研究中，噪声检测阈值作为频率范围、f 和谐波掩蔽器的总水平的函数进行测量。频率范围以等效矩形带宽 (ERB) 单位指定（3-13、13-23、23-33 或 3-33 ERB）。结果与以下观点一致，即当掩蔽器仅由已解析成分组成时（3-13 ERB），听众依赖于频谱线索，而当掩蔽器仅包含未解析成分时（23-33 ERB），听众依赖于时间（听差）线索。当掩蔽器水平较高（70 dBA）时，噪声检测阈值通常低于水平较低（50 dBA）时。只有当听众依赖于频谱线索来检测噪声时，掩蔽器 f 才会影响阈值。对于宽带（3-33 ERB）掩蔽器，听众可能通过关注具有最有利噪声与谐波比的频带（23-33 ERB）来检测噪声。