Fig S2 The effect of number of singers, SNR and the percentage of song units within a sound file on automatic song unit detections

Fig S2. All tested variables showed significant positive correlation with the detection rate by the automatic detector using the non-parametric Spearman’s rank correlation (r =roh) indicating a significant effect on the resulting detection rate (per minute of effort) in each sound file. A) correlation between the minimum number of singers per sound file and the detection rate, B) correlation between the signal to noise ratio (SNR) per sound file and the detection rate, C) correlation between the % of each sound file which included song units and the detection rate.

补充图S2。采用非参数斯皮尔曼等级相关分析（Spearman’s rank correlation，相关系数r=ρ），结果显示所有测试变量均与自动检测器的检出率呈显著正相关，表明各变量对每个音频文件的最终检出率（单位：每分钟检测工作量）存在显著影响。A) 单个音频文件中最小鸣叫个体数与检出率的相关性；B) 单个音频文件的信噪比（Signal to Noise Ratio, SNR）与检出率的相关性；C) 单个音频文件中包含鸣唱单元的片段占比与检出率的相关性。