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首页> 外文期刊>Bioacoustics: The International Journal of Animal Sound and its Recording >Temporal and spectral characteristics of the male Eleutherodactylus coqui two-note vocalization in Hawaii
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Temporal and spectral characteristics of the male Eleutherodactylus coqui two-note vocalization in Hawaii

机译：在夏威夷的男性Eleutherodactylus coqui两音发声的时间和频谱特征

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摘要

Temporal and spectral characteristics of the two-note vocalization of the male Eleutherodactylus coqui in Hawaii were investigated and measured in order to establish an average source level of the male coqui. We compared various vocalization parameters obtained from previous research in Puerto Rico with similar parameters measured in Hawaii, including note duration, inter-note interval, call repetition period, centre frequency and bandwidth. Digitized sound records of coqui vocalization were used to calculate the root-mean-square of source level for the frog referenced to a 1m distance for the Co and Qui notes individually and combined. Additional parameters calculated for the vocalizations were difference in the source levels between Co and Qui notes, duty cycle, ratio of Qui to Co note duration and ratio of the Qui to Co centre frequencies. Most of the frog vocalization parameters were sensitive to air temperature displaying significant regressions over a 4℃ temperature range (18.6–22.68C). Surprisingly, the average ratio of Qui to Co centre frequency among n=55 frogs was 1.81 with a strikingly low standard deviation of 0.07. The coupling of individual variation in Co and Qui centre frequencies producing such low ratio standard deviation is likely due to body mass-related scaling of laryngeal cartilages, vocal chords and muscles responsible for the vocal emission. Co and Qui centre frequency variations can reveal information about the body size of the calling frogs.
机译：为了确定雄性Hawaii蛇的平均声源水平，调查并测量了夏威夷雄性斑尾按蚊两声发声的时间和频谱特征。我们将波多黎各先前研究中获得的各种发声参数与在夏威夷测得的相似参数进行了比较，包括音符持续时间，音符间隔，通话重复周期，中心频率和带宽。 Coqui发声的数字化声音记录用于计算青蛙的源电平的均方根，其中Co和Qui音符分别以1m距离为参考，并进行组合。为发声计算的其他参数是Co和Qui音符之间的源电平，占空比，Qui与Co音符持续时间之比以及Qui与Co中心频率之比之间的差异。大多数青蛙发声参数对空气温度敏感，在4℃的温度范围内（18.6-22.68℃）显示出显着的回归。出人意料的是，n = 55只青蛙的Qui与Co中心频率的平均比率为1.81，标准偏差为0.07，非常低。 Co和Qui中心频率的个体变化的耦合产生如此低的比率标准偏差，可能是由于与体重相关的喉软骨，声带和负责声发射的肌肉与体重有关。 Co和Qui中心频率的变化可以揭示有关蛙类蛙体大小的信息。

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