Low-frequency temporary threshold shift not observed in spotted or ringed seals exposed to single air gun impulses

Underwater hearing thresholds were measured at 100 Hz in trained spotted (Phoca largha) and ringed seals (Pusa hispida) before and immediately following voluntary exposure to impulsive noise from a seismic air gun. Auditory responses were determined from psychoacoustic data and behavioral responses were scored from video recordings. Four successive exposure conditions of increasing level were tested, with received unweighted sound exposure levels from 165 to 181 dB re 1 μPa2 s and peak-to-peak sound pressures from 190 to 207 dB re 1 μPa. There was no evidence that these single seismic exposures altered hearing—including in the highest exposure condition, which matched previous predictions of temporary threshold shift (TTS) onset. Following training at low exposure levels, relatively mild behavioral responses were observed for higher exposure levels. This demonstrates that individuals can learn to tolerate loud, impulsive sounds, but does not necessarily imply that similar sounds would n..., , # Data from: Low-frequency temporary threshold shift not observed in spotted or ringed seals exposed to single air gun impulses Dataset DOI: [10.5061/dryad.v41ns1sbr](https://doi.org/10.5061/dryad.v41ns1sbr) ## Description of the data and file structure To evaluate the residual effects of underwater noise on pinnipeds, hearing thresholds were obtained for four seal subjects before and after voluntary exposure to impulsive noise from a seismic air gun. Behavioral psychophysical methods were used to cooperatively evaluate hearing. Temporary threshold shift (TTS) was measured as the difference between a seal's pre-exposure hearing threshold and the subsequent post-exposure hearing threshold at 100 Hz, approximately ½-octave above the maximum energy in the received impulse. Four successive exposure conditions of increasing level were tested, denoted as C1, C2, C3, and C4. These exposure conditions were associated with received unweighted sound exposure levels from 165 to 181 dB re (1 μP..., , ,针对经过训练的斑海豹（Phoca largha）与环斑海豹（Pusa hispida），本研究在其自愿暴露于气枪脉冲式水下噪声前后，测定了其100Hz下的水下听阈。听觉反应通过心理声学数据进行判定，行为反应则通过录像进行评分。本研究设置了四个逐级提升强度的连续暴露条件，其接收未加权声暴露级为165至181dB（参考1μPa²·s），峰峰值声压为190至207dB（参考1μPa）。未发现单次气枪暴露会改变海豹听阈的证据，即便在匹配此前临时阈移（Temporary Threshold Shift, TTS）发作预测阈值的最高强度暴露组中亦是如此。在低强度暴露下完成训练后，针对更高强度的暴露仅观察到相对温和的行为反应。这表明个体能够学会耐受高强度脉冲噪声，但无法直接推断类似噪声在...（原文截断）。 # 数据来源：《单次气枪脉冲暴露下斑海豹与环斑海豹未出现低频临时阈移》 数据集DOI：[10.5061/dryad.v41ns1sbr](https://doi.org/10.5061/dryad.v41ns1sbr) ## 数据与文件结构说明 为评估水下噪声对鳍足类动物的后遗效应，本研究针对4只海豹受试个体，在其自愿暴露于气枪脉冲式水下噪声前后测定了听阈。研究采用行为心理物理学方法协同评估听觉功能。临时阈移（Temporary Threshold Shift, TTS）通过海豹暴露前与暴露后100Hz下的听阈差值进行计算，该频率较接收脉冲的最大能量峰值高约半个倍频程。本研究设置了四个逐级提升强度的连续暴露条件，分别记为C1、C2、C3、C4。各暴露条件对应的接收未加权声暴露级为165至181dB（参考1μP...）（原文截断）。