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For both stimuli, the relative feeding duration increased (trial × stimulus: P = 0.05) and the relative alertness duration decreased (trial × stimulus: P = 0.004) from the first to the fifth trial but returned to the levels of the reference values sooner when goats were exposed to the uniform than the non-uniform sound. Sounds include various baa, meh and bleating sounds. During the first trial, the relative feeding duration was decreased and the relative alertness duration was increased during both stimuli, but more when goats were exposed to the non-uniform than the uniform sound. Differences in behaviour and heartbeat parameters between test and reference values were analysed by using generalised linear mixed-effects models. During the following five trials, playbacks were conducted. A day before the first trial, reference values were collected without playback. Twenty-nine goats were tested individually in a test arena in two sessions, each lasting five consecutive days with one trial per day. The aim of this study was to test whether a non-uniform sound (chime of a bell) varying in amplitude and frequency and a uniform sound (sinusoidal tone) with continuously increasing amplitude and constant frequency lead to stress responses in terms of behaviour and heartbeat. a chime of a bell) may act as stressors depending on their characteristics. Considering that goats have a well-developed hearing capacity, sounds (e.g. In alpine regions, bells are used to relocate free-ranging grazers like cows and goats.