Pig sound extraction method, device and equipment and readable storage medium

The invention discloses a pig sound extraction method, which comprises the following steps of: firstly, carrying out environmental noise removal on sound data acquired on a pig breeding site to eliminate interference of environmental noise on subsequent detection and identification, then, carrying out filtering and screening according to a short-time zero-crossing rate threshold value to obtain preliminarily filtered sound data, and carrying out expansion processing on the preliminarily filtered sound data according to a short-time energy threshold value. Through the configuration of the processing sequence, the accuracy of pig sound detection can be remarkably improved, and precise segmentation is realized. Meanwhile, a threshold value used in filtering, screening and expansion processing is a threshold value generated by self-adaptive adjustment according to each section of noise reduction sound data, and the threshold value is self-adaptively adjusted according to a detection object, so that each threshold