“…Therefore, an automated behavior‐monitoring system is needed. In response to this need various research studies have been conducted and published, such as: a one‐axis accelerometer mounted to the collar of cattle (Ueda, Akiyama, Asakuma, & Watanabe, ), the detection of eating and estimation of feed intake by pendulum (Uemura, Wanaka, & Ueno, ), a bitemeter incorporated microphone and a mercury switch (Delagarde, Caudal, & Peyraud, ), a pressure sensor attached to the halter (Braun, Trösch, Nydegger, & Hässig, ), the detection of eating and rumination by one‐axis accelerometer with a voice recorder attached to a horn (Tani, Yokota, Yayota, & Ohtani, ), the detection of rumination time by a logger attached to the collar (Schirmann, von Keyserlingk, Weary, Veira, & Heuwieser, ), and the monitoring of lying behavior using a pedometor (Mattachini, Antler, Riva, Arbel, & Provolo, ). However, these are limited to the detection of simple behaviors, which is unsuitable for understanding complex behaviors.…”