Samenvatting

In this study, we recorded sound and behaviour from dairy cows by audio and video recordings. Four cameras and microphones were placed in a modern dairy farm in Herwijnen, The Netherlands. Three cameras and microphones recorded dairy cows, one camera and microphone recorded heifers between four and ten months of age. First a 5-days period of 10 recording hours per day was used to test the technical installation and to adjust microphones and cameras. Dampers were installed for noise reduction. Next, recordings were made for 17 days, 10 hours per day. Two days of recordings were discarded due to technical problems, and the remaining 15 days of 10 hours of synchronised audio and video recordings were analysed.