The aim of this study was to validate whether acoustic data analysis can be used to assess respiration rate (RR) in dairy cattle under grazing systems. Two validation trials, one with heifers and other with lactating cows, were conducted. The RR derived from acoustic data acquired with an MP3 recorder fitted on the halter was compared to the RR derived from a visual method, counting flank movements. Data were analyzed using correlation test and Willmott's index of agreement (d). There was no significant difference (P>0.05) between RR assessed using the acoustic or visual method, in both heifers and lactating cows. The coefficients of determination (R²) indicated that 92.31% (heifers) and 62.09% (lactating cows) of the variability in the RR derived using the visual assessment method was explained by the RR derived using the acoustic method. The d values were 0.99 (heifers) and 0.98 (lactating cows), which denoted good agreement between the RR derived using the two methods. The acoustic method is non-invasive, allows for the assessment of RR in free-grazing dairy cattle and may replace the current standard of visual counting.

这项研究的目的是验证是否可以使用声学数据分析来评估放牧系统下奶牛的呼吸速率（RR）。进行了两项验证试验，一项针对小母牛，另一项针对奶牛。将通过安装在露背上的MP3记录器获取的声学数据得出的RR与通过视觉方法得出的RR进行比较，以计算侧面运动。使用相关检验和Willmott一致性指数（d）分析数据。在小母牛和泌乳母牛中，通过声学或视觉方法评估的RR之间没有显着差异（P> 0.05）。测定系数（R ²）表明，通过视觉评估方法得出的RR解释了使用视觉评估方法得出的RR的92.31％（小母牛）和62.09％（泌乳母牛）的变化。的d值分别为0.99（母牛）和0.98（产奶奶牛），它表示很好的一致性之间使用两种方法中的RR的。声学方法是非侵入性的，可以评估自由放牧奶牛的RR，并且可以替代当前的视觉计数标准。