Data from: Temporal changes in songbird vocalizations associated with helicopter noise in Hawaii's protected natural areas

H1_NoiseGradient.csv

Data frame that contains acoustic characteristics measured in Raven Pro 1.5 from helicopter noise and six species of birds on Hawaii Island to answer “Question 1,” does total vocalization time (s) of birds change with increasing power of helicopter noise (dB)? The columns show the recording site (“site”); the recording station (“station”); the unique identifier of each helicopter recording (“fileID”); the ten-second interval of helicopter noise from where measurements were taken (“selection_no”); whether the ten-second interval was at the beginning, middle, or end of the helicopter noise, from start of noise to peak frequency (“period”); the maximum power of the helicopter noise during each ten-second interval (“dB”); the frequency range of the helicopter noise during each ten-second interval (“freq”); the total vocalization time of each bird species during the ten-second interval (“tot_voctime”); the four-letter code of each bird species (“species”); and the type of vocalization detected for each bird species during the ten-second interval (“voctype”).

H2_NoisePeriods.csv

Data frame that contains acoustic characteristics measured in Raven Pro 1.5 from helicopter noise and five species of birds on Hawaii Island to answer “Question 2,” does total vocalization time (s) of birds differ between ten-second periods “before,” “during,” and “after” helicopter noise? The columns show the recording site (“site”); the recording station (“station”); the unique identifier of each helicopter recording (“fileID”); the total vocalization time of each bird species during the ten-second interval (“tot_voctime”); the four-letter code of each bird species (“species”); the type of vocalization detected for each bird species during the ten-second interval (“voctype”); the period of helicopter noise, before, during, or after (“Period”); and the maximum power of the helicopter noise for the entirety of the helicopter noise (“dB”).

H3_AcousticIndex.csv

Data frame that contains Bioacoustic Index measurements calculated between 4 – 8 kHz from ten-second intervals of a soundscape recording containing biotic sounds and helicopter noise. The Bioacoustic Index was calculated using the R package Soundecology (Villanueva-Rivera et al. 2011). The columns show the recording site (“site”); the recording station (“station”); the unique identifier of each helicopter recording (“fileID”); the period of helicopter noise, before, during, or after (“Period”); and the Bioacoustic Index measurement (“BI_4kHz”).

HelicopterAbundance.csv

Data frame that contains helicopter counts (“heli.abundance”) for each recording site (“Site”) during nine hours of recordings.

AmbientNoise_Measurements_UWFR.xlsx

Data frame that contains power measurements (dBA) of ambient noise at the Upper Waiākea Forest Reserve. Columns show the recording station (“Recording Station”); the time of day at which the measurement was taken, in military time (“Time”); the first power measurement (“Meas 1”); the second power measurement (“Meas 2”); the third power measurement (“Meas 3”); and the average power measurement for each recording station (“Average”).

H1_NoiseGradient.csv
该数据集为数据框（data frame），包含通过Raven Pro 1.5软件于夏威夷岛采集的直升机噪声与六种鸟类的声学特征，用于回答“问题1”：鸟类总发声时长（单位：秒）是否随直升机噪声功率（单位：分贝）的升高而变化？
各字段含义如下：
“site”：录音采样位点；
“station”：录音站；
“fileID”：单条直升机录音的唯一标识符；
“selection_no”：采集声学测量所用的直升机噪声10秒片段编号；
“period”：该10秒片段处于直升机噪声的起始、中段还是尾段（从噪声起始到峰值频率阶段）；
“dB”：单条10秒片段内直升机噪声的最大声功率；
“freq”：单条10秒片段内直升机噪声的频率范围；
“tot_voctime”：该10秒片段内各鸟类物种的总发声时长；
“species”：各鸟类物种的四字母物种代码；
“voctype”：该10秒片段内检测到的各鸟类物种的发声类型。

H2_NoisePeriods.csv
该数据集为数据框（data frame），包含通过Raven Pro 1.5软件于夏威夷岛采集的直升机噪声与五种鸟类的声学特征，用于回答“问题2”：鸟类的总发声时长（单位：秒）在直升机噪声出现前、出现期间与出现后的10秒片段中是否存在差异？
各字段含义如下：
“site”：录音采样位点；
“station”：录音站；
“fileID”：单条直升机录音的唯一标识符；
“tot_voctime”：该10秒片段内各鸟类物种的总发声时长；
“species”：各鸟类物种的四字母物种代码；
“voctype”：该10秒片段内检测到的各鸟类物种的发声类型；
“Period”：该10秒片段对应的直升机噪声阶段（前、中、后）；
“dB”：单条完整直升机录音的最大声功率。

H3_AcousticIndex.csv
该数据集为数据框（data frame），包含从包含生物声与直升机噪声的声景录音的10秒片段中计算得到的4–8 kHz频段生物声学指数（Bioacoustic Index）测量值。该生物声学指数通过R语言扩展包Soundecology（Villanueva-Rivera等人，2011）计算得到。
各字段含义如下：
“site”：录音采样位点；
“station”：录音站；
“fileID”：单条直升机录音的唯一标识符；
“Period”：该10秒片段对应的直升机噪声阶段（前、中、后）；
“BI_4kHz”：4–8 kHz频段的生物声学指数测量值。

HelicopterAbundance.csv
该数据集为数据框（data frame），包含9小时录音过程中各采样位点（“Site”）的直升机出现频次（“heli.abundance”）。

AmbientNoise_Measurements_UWFR.xlsx
该数据集为数据框（data frame），包含上怀亚基阿森林保护区（Upper Waiākea Forest Reserve）的环境噪声功率测量值（单位：dBA）。
各字段含义如下：
“Recording Station”：录音站；
“Time”：采用军用时间格式记录的测量时刻；
“Meas 1”：首次功率测量值；
“Meas 2”：第二次功率测量值；
“Meas 3”：第三次功率测量值；
“Average”：单录音站的平均功率测量值。