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Signal Process."],"abstract":"<jats:title>Abstract<\/jats:title><jats:p>It is desired to apply deep learning models (DLMs) to assist physicians in distinguishing abnormal\/normal lung sounds as quickly as possible. The performance of DLMs depends on feature-related and model-related parameters heavily. In this paper, the relationship between performance and feature-related parameters of a DLM, i.e., convolutional neural network (CNN) is analyzed through experiments. ICBHI 2017 is selected as the lung sounds dataset. The sensitivity analysis of classification performance of the DLM on three parameters, i.e., the length of lung sounds frame, overlap percentage (OP) of successive frames and feature type, is performed. An augmented and balanced dataset is acquired by the way of white noise addition, time stretching and pitch shifting. The spectrogram and mel frequency cepstrum coefficients of lung sounds are used as features to the CNN, respectively. The results of training and test show that there exists significant difference on performance among various parameter combinations. The parameter OP is performance sensitive. The higher OP, the better performance. It is concluded that for fixed sampling frequency 8\u00a0kHz, frame size 128, OP 75% and spectrogram feature is optimum under which the performance is relatively better and no extra computation or storage resources are required.<\/jats:p>","DOI":"10.1186\/s13634-024-01148-w","type":"journal-article","created":{"date-parts":[[2024,4,15]],"date-time":"2024-04-15T14:02:29Z","timestamp":1713189749000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Performance evaluation of lung sounds classification using deep learning under variable parameters"],"prefix":"10.1186","volume":"2024","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-6367-2161","authenticated-orcid":false,"given":"Zhaoping","family":"Wang","sequence":"first","affiliation":[]},{"given":"Zhiqiang","family":"Sun","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2024,4,15]]},"reference":[{"key":"1148_CR1","unstructured":"World Health Statistics 2022, Technical Report (World Health Organization, Geneva, 2022)"},{"key":"1148_CR2","doi-asserted-by":"publisher","first-page":"4","DOI":"10.1007\/s13755-019-0091-3","volume":"8","author":"F Demir","year":"2019","unstructured":"F. 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