Glottal Efficiency of Periodic and Irregular In Vitro Red Deer Voice Production
Glottal Efficiency of Periodic and Irregular In Vitro Red Deer Voice Production
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DOI：
10.3813/aaa.918751
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发表时间：
2014-07-01
影响因子：
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通讯作者：
Herbst, Christian T.
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文献类型：
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作者：
Herbst, Christian T.
在切除喉部的情况下，通过改变声门下压力作为独立参数，对两只雌性马鹿喉部进行人工发声。利用最新发展的相图技术对采集到的数据进行周期性、次谐波和不规则性的标注。声门效率非线性地依赖于声门下压力。当声门下压力大于1kpa时，两个喉部的声门效率分别线性增加约3.1和3.7 dB / kPa。在声门下压力大于1.5 kPa时，不规则声段的声门效率比周期声段和次谐波声段的声门效率平均高2.5 ~ 3db。这项初步研究的结果表明，在较高的声门下压力下，一种不规则的发声机制可能会。在动物的声音交流中将代谢能转化为声能时，是一种获得能量优势的手段。
Two female red deer larynges were artificially phonated in an excised larynx setup by varying subglottal pressure as the independent parameter. The acquired data were annotated as periodic, subharmonic and irregular by means of the recently developed phasegram technique. Glottal efficiency was non-linearly dependent on subglottal pressure. Above 1 kPa subglottal pressure the glottal efficiency increased linearly by about 3.1 and 3.7 dB per kPa, respectively, in the two larynges. At subglottal pressures above 1.5 kPa the glottal efficiency of the irregular segments was in average about 2.5 to 3 dB greater than that of the periodic and subharmonic segments. The results of this pilot study suggest that an irregular sound production mechanism at higher subglottal pressures could. be a means to gain an energetic advantage in animal vocal communication when converting metabolic to acoustic energy.