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However, the conventional methods for simulating or measuring long RIRs are either computationally intensive or challenged by low signal-to-noise ratios. This study is propelled by the insight that direct sound and early reflections encapsulate sufficient information about room geometry and absorption characteristics. Building upon this premise, we propose a novel task termed \"RIR completion,\" aimed at synthesizing the late reverberation given only the early portion (50 ms) of the response. To this end, we introduce <jats:bold>DECOR<\/jats:bold>, <jats:bold>D<\/jats:bold>eep <jats:bold>E<\/jats:bold>xponential <jats:bold>C<\/jats:bold>ompletion <jats:bold>O<\/jats:bold>f <jats:bold>R<\/jats:bold>oom impulse responses, a deep neural network structured as an encoder-decoder designed to predict multi-exponential decay envelopes of filtered noise sequences. The proposed method is compared against a much larger adapted state-of-the-art network, and comparable performance shows promising results supporting the feasibility of the RIR completion task. The RIR completion can be widely adapted to enhance RIR generation tasks where fast late reverberation approximation is required.<\/jats:p>","DOI":"10.1186\/s13636-024-00383-1","type":"journal-article","created":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T06:17:00Z","timestamp":1748326620000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Deep room impulse response completion"],"prefix":"10.1186","volume":"2025","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-1663-8637","authenticated-orcid":false,"given":"Jackie","family":"Lin","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Georg","family":"G\u00f6tz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sebastian J.","family":"Schlecht","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,5,27]]},"reference":[{"issue":"2","key":"383_CR1","doi-asserted-by":"publisher","first-page":"708","DOI":"10.1121\/1.4926438","volume":"138","author":"L Savioja","year":"2015","unstructured":"L. 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