{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,7]],"date-time":"2026-02-07T04:06:04Z","timestamp":1770437164918,"version":"3.49.0"},"reference-count":37,"publisher":"Springer Science and Business Media LLC","issue":"4","license":[{"start":{"date-parts":[[2012,12,27]],"date-time":"2012-12-27T00:00:00Z","timestamp":1356566400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/www.springer.com\/tdm"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Med Biol Eng Comput"],"published-print":{"date-parts":[[2013,4]]},"DOI":"10.1007\/s11517-012-1011-8","type":"journal-article","created":{"date-parts":[[2012,12,26]],"date-time":"2012-12-26T03:45:14Z","timestamp":1356493514000},"page":"429-439","source":"Crossref","is-referenced-by-count":13,"title":["Intra-subject variability of snoring sounds in relation to body position, sleep stage, and blood oxygen level"],"prefix":"10.1007","volume":"51","author":[{"given":"Ali","family":"Azarbarzin","sequence":"first","affiliation":[]},{"given":"Zahra","family":"Moussavi","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2012,12,27]]},"reference":[{"key":"1011_CR1","first-page":"205","volume":"56","author":"V Hoffstein","year":"2002","unstructured":"Hoffstein V (2002) Apnea and snoring: state of the art and future directions. Acta Otorhinolaryngol Belg 56:205\u2013236","journal-title":"Acta Otorhinolaryngol Belg"},{"key":"1011_CR2","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1111\/j.1600-0404.1994.tb02754.x","volume":"90","author":"K Martikainen","year":"1994","unstructured":"Martikainen K, Partinen M, Urponen H, Vuori I, Laippala P, Hasan J (1994) Natural evolution of snoring: a 5-year follow-up study. Acta Neurol Scand 90:437\u2013442","journal-title":"Acta Neurol Scand"},{"key":"1011_CR3","doi-asserted-by":"crossref","first-page":"1156","DOI":"10.1109\/TBME.2010.2061846","volume":"58","author":"A Azarbarzin","year":"2011","unstructured":"Azarbarzin A, Moussavi Z (2011) Automatic and unsupervised snore sound extraction from respiratory sound signals. IEEE Trans Biomed Eng 58:1156\u20131162","journal-title":"IEEE Trans Biomed Eng"},{"key":"1011_CR4","doi-asserted-by":"crossref","first-page":"841","DOI":"10.1088\/0967-3334\/28\/8\/007","volume":"28","author":"M Cavusoglu","year":"2007","unstructured":"Cavusoglu M, Kamasak M, Erogul O, Ciloglu T, Serinagaoglu Y, Akcam T (2007) An efficient method for snore\/nonsnore classification of sleep sounds. Physiol Meas 28:841\u2013853","journal-title":"Physiol Meas"},{"key":"1011_CR5","doi-asserted-by":"crossref","first-page":"463","DOI":"10.1007\/s00405-010-1386-9","volume":"268","author":"M Herzog","year":"2011","unstructured":"Herzog M, Bremert T, Herzog B, Hosemann W, Kaftan H, M\u00fcller A (2011) Analysis of snoring sound by psychoacoustic parameters. Eur Arch Otorhinolaryngol 268:463\u2013470","journal-title":"Eur Arch Otorhinolaryngol"},{"issue":"2","key":"1011_CR6","doi-asserted-by":"crossref","first-page":"167","DOI":"10.1088\/0967-3334\/20\/2\/306","volume":"20","author":"P Hill","year":"1999","unstructured":"Hill P, Lee B, Osborne J, Osman E (1999) Palatal snoring identified by acoustic crest factor analysis. Physiol Meas 20(2):167\u2013174","journal-title":"Physiol Meas"},{"key":"1011_CR7","doi-asserted-by":"crossref","first-page":"S13","DOI":"10.3109\/00016489.2012.660733","volume":"132","author":"T Won","year":"2012","unstructured":"Won T, Kim SY, Lee WH, Han DH, Kim D, Kim J, Rhee C, Lee CH (2012) Acoustic characteristics of snoring according to obstruction site determined by sleep videofluoroscopy. Acta Otolaryngol 132:S13\u2013S20","journal-title":"Acta Otolaryngol"},{"key":"1011_CR8","first-page":"1288","volume":"143","author":"OJ Polo","year":"1991","unstructured":"Polo OJ, Tafti M, Fraga J, Porkka KVK, Dejean Y, Billiard M (1991) Why don\u2019t all heavy snorers have obstructive sleep apnea? Am J Respir Crit Care Med 143:1288\u20131293","journal-title":"Am J Respir Crit Care Med"},{"key":"1011_CR9","doi-asserted-by":"crossref","first-page":"779","DOI":"10.1088\/0967-3334\/26\/5\/016","volume":"26","author":"U Abeyratne","year":"2005","unstructured":"Abeyratne U, Wakwella A, Hukins C (2005) Pitch jump probability measures for the analysis of snoring sounds in apnea. Physiol Meas 26:779\u2013798","journal-title":"Physiol Meas"},{"key":"1011_CR10","doi-asserted-by":"crossref","first-page":"1796","DOI":"10.1007\/s10439-009-9744-8","volume":"37","author":"A Ng","year":"2009","unstructured":"Ng A, Koh T, Abeyratne U, Puvanendran K (2009) Investigation of obstructive sleep apnea using nonlinear mode interactions in nonstationary snore signals. Ann Biomed Eng 37:1796\u20131806","journal-title":"Ann Biomed Eng"},{"issue":"9","key":"1011_CR11","doi-asserted-by":"crossref","first-page":"1807","DOI":"10.1007\/s10439-009-9745-7","volume":"37","author":"AK Ng","year":"2009","unstructured":"Ng AK, Koh TS, Baey E, Puvanendran K (2009) Role of upper airway dimensions in snore production: acoustical and perceptual findings. Ann Biomed Eng 37(9):1807\u20131817","journal-title":"Ann Biomed Eng"},{"key":"1011_CR12","doi-asserted-by":"crossref","first-page":"373","DOI":"10.1007\/s11517-012-0885-9","volume":"50","author":"J Mesquita","year":"2012","unstructured":"Mesquita J, Sol\u00e0-Soler J, Fiz JA, Morera J, Jan\u00e9 R (2012) All night analysis of time interval between snores in subjects with sleep apnea hypopnea syndrome. Med Biol Eng Comput 50:373\u2013381","journal-title":"Med Biol Eng Comput"},{"issue":"9","key":"1011_CR13","doi-asserted-by":"crossref","first-page":"1213","DOI":"10.1016\/j.medengphy.2011.12.008","volume":"34","author":"J Sol\u00e0-Soler","year":"2012","unstructured":"Sol\u00e0-Soler J, Fiz JA, Morera J, Jan\u00e9 R (2012) Multiclass classification of subjects with sleep apnoea-hypopnoea syndrome through snoring analysis. Med Eng Phys 34(9):1213\u20131220","journal-title":"Med Eng Phys"},{"key":"1011_CR14","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1088\/0967-3334\/32\/1\/006","volume":"32","author":"AS Karunajeewa","year":"2011","unstructured":"Karunajeewa AS, Abeyratne UR, Hukins C (2011) Multi-feature snore sound analysis in obstructive sleep apnea\u2014hypopnea syndrome. Physiol Meas 32:83\u201397","journal-title":"Physiol Meas"},{"key":"1011_CR15","unstructured":"Ng AK, Koh TS, Baey E, Puvanendran K (2007) Diagnosis of obstructive sleep apnea using formant features of snore signals. In: Proceedings of world congress on medical physics and biomedical engineering 2006, IFMBE, vol 14, pp 967\u2013970"},{"key":"1011_CR16","doi-asserted-by":"crossref","first-page":"791","DOI":"10.1007\/s11517-007-0186-x","volume":"45","author":"U Abeyratne","year":"2007","unstructured":"Abeyratne U, Karunajeewa A, Hukins C (2007) Mixed-phase modeling in snore sound analysis. Med Bio Eng Comput 45:791\u2013806","journal-title":"Med Bio Eng Comput"},{"key":"1011_CR17","doi-asserted-by":"crossref","first-page":"879","DOI":"10.1088\/0967-3334\/29\/8\/003","volume":"29","author":"M Cavusoglu","year":"2008","unstructured":"Cavusoglu M, Ciloglu T, Serinagaoglu Y, Kamasak M, Erogul O, Akcam T (2008) Investigation of sequential properties of snoring episodes for obstructive sleep apnoea identification. Physiol Meas 29:879\u2013898","journal-title":"Physiol Meas"},{"key":"1011_CR18","doi-asserted-by":"crossref","unstructured":"Azarbarzin A, Moussavi Z (2012) Snoring sounds variability as a signature of obstructive sleep apnea. Med Eng Phys. doi: 10.1016\/j.medengphy.2012.06.013","DOI":"10.1016\/j.medengphy.2012.06.013"},{"key":"1011_CR19","doi-asserted-by":"crossref","unstructured":"Azarbarzin A, Moussavi Z (2012) A comparison between recording sites of snoring sounds in relation to upper airway obstruction. In: Engineering in medicine and biology society (EMBC), Annual international conference of the IEEE, pp 4246\u20134249","DOI":"10.1109\/EMBC.2012.6346904"},{"issue":"2","key":"1011_CR20","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1093\/sleep\/26.2.169","volume":"26","author":"H Nakano","year":"2003","unstructured":"Nakano H, Ikeda T, Hayashi M, Ohshima E, Onizuka A (2003) Effects of body position on snoring in apneic and nonapneic snorers. Sleep 26(2):169\u2013172","journal-title":"Sleep"},{"key":"1011_CR21","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1016\/j.smrv.2009.06.002","volume":"14","author":"D Pevernagie","year":"2010","unstructured":"Pevernagie D, Aarts RMMeyer MD (2010) The acoustics of snoring. Sleep Med Rev 14:131\u2013144","journal-title":"Sleep Med Rev"},{"issue":"3","key":"1011_CR22","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1164\/ajrccm\/147.3.635","volume":"147","author":"J Perez-Padilla","year":"1993","unstructured":"Perez-Padilla J, Slawinski E, Difrancesco L, Feige R, Remmers J, Whitelaw W (1993) Characteristics of the snoring noise in patients with and without occlusive sleep apnea. Am Rev Respir Dis 147(3):635\u2013644","journal-title":"Am Rev Respir Dis"},{"key":"1011_CR23","doi-asserted-by":"crossref","first-page":"1315","DOI":"10.1007\/s00405-008-0858-7","volume":"266","author":"M Herzog","year":"2009","unstructured":"Herzog M, K\u00fchnel T, Bremert T, Herzog B, Hosemann W, Kaftan H (2009) The impact of the microphone position on the frequency analysis of snoring sounds. Eur Arch Otorhinolaryngol 266:1315\u20131322","journal-title":"Eur Arch Otorhinolaryngol"},{"key":"1011_CR24","unstructured":"Huang X, Acero A, Hon H (2001) Formant frequencies. In: Spoken language processing: a guide to theory, algorithm and system development. Prentice Hall PTR, New Jersey, pp 319\u2013324"},{"key":"1011_CR25","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1111\/j.1467-9892.1993.tb00144.x","volume":"14","author":"CM Hurvich","year":"1993","unstructured":"Hurvich CM, Tsai C (1993) A corrected Akaike information criterion for vector autoregressive model selection. J Time Ser Anal 14:271\u2013279","journal-title":"J Time Ser Anal"},{"key":"1011_CR26","doi-asserted-by":"crossref","first-page":"204","DOI":"10.1016\/0013-4694(91)90138-T","volume":"79","author":"T Inouye","year":"1991","unstructured":"Inouye T, Shinosaki K, Sakamoto H, Toi S, Ukai S, Iyama A, Katsuda Y, Hirano M (1991) Quantification of EEG irregularity by use of the entropy of the power spectrum. Electroencephalogr Clin Neurophysiol 79:204\u2013210","journal-title":"Electroencephalogr Clin Neurophysiol"},{"key":"1011_CR27","unstructured":"Proakis JG, Manolakis DK (2006) Power spectrum estimation. In: Digital signal processing, 4th edn, Prentice Hall, New Jersey"},{"key":"1011_CR28","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1109\/51.537065","volume":"15","author":"ME Cohen","year":"1996","unstructured":"Cohen ME, Hudson DL, Deedwania PC (1996) Applying continuous chaotic modeling to cardiac signal analysis. Eng Med Biol Mag IEEE 15:97\u2013102","journal-title":"Eng Med Biol Mag IEEE"},{"key":"1011_CR29","volume-title":"Principal component analysis","author":"L Jolliffe","year":"2002","unstructured":"Jolliffe L (2002) Principal component analysis. Springer-Verlag, Inc., New York"},{"key":"1011_CR30","doi-asserted-by":"crossref","unstructured":"BW Silverman (1986) Density estimation for statistics and data analysis. Chapman and Hall, New York","DOI":"10.1007\/978-1-4899-3324-9"},{"key":"1011_CR31","first-page":"356","volume-title":"Nonparametric density estimation: the L1 view","author":"L Devroye","year":"1985","unstructured":"Devroye L, Gy\u00f6rfi L (1985) Nonparametric density estimation: the L1 view. Wiley, New York, p 356"},{"key":"1011_CR32","unstructured":"Theodoridis S, Koutroumbas K (2008) Feature selection. In: Pattern recognition, 4th edn. Academic Press, USA, pp 275\u2013276"},{"key":"1011_CR33","unstructured":"Burden RL, Faires JD (2005) Numerical differentiation and integration. In: Numerical analysis. Thomson Brooks\/Cole, California, pp 167\u2013247"},{"key":"1011_CR34","unstructured":"Searle SR (1971) Models not of full rank. In: Linear Mmdels. Wiley, New York, pp 164\u2013225"},{"issue":"1","key":"1011_CR35","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1164\/ajrccm.152.1.7599821","volume":"152","author":"D Pevernagie","year":"1995","unstructured":"Pevernagie D, Stanson A, Sheedy P, Daniels B, Shepard J (1995) Effects of body position on the upper airway of patients with obstructive sleep apnea. Am J Respir Crit Care Med 152(1):179\u2013185","journal-title":"Am J Respir Crit Care Med"},{"key":"1011_CR36","doi-asserted-by":"crossref","first-page":"453","DOI":"10.1093\/biomet\/58.3.453","volume":"58","author":"KR Gabriel","year":"1971","unstructured":"Gabriel KR (1971) The biplot graphic display of matrices with application to principal component analysis. Biometrika 58:453\u2013467","journal-title":"Biometrika"},{"issue":"1","key":"1011_CR37","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1053\/smrv.2002.0238","volume":"7","author":"I Ayappa","year":"2003","unstructured":"Ayappa I, Rapoport D (2003) The upper airway in sleep: physiology of the pharynx. Sleep Med Rev 7(1):9\u201333","journal-title":"Sleep Med Rev"}],"container-title":["Medical &amp; Biological Engineering &amp; Computing"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/s11517-012-1011-8.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/article\/10.1007\/s11517-012-1011-8\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/s11517-012-1011-8","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,7,7]],"date-time":"2019-07-07T11:47:21Z","timestamp":1562500041000},"score":1,"resource":{"primary":{"URL":"http:\/\/link.springer.com\/10.1007\/s11517-012-1011-8"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,12,27]]},"references-count":37,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2013,4]]}},"alternative-id":["1011"],"URL":"https:\/\/doi.org\/10.1007\/s11517-012-1011-8","relation":{},"ISSN":["0140-0118","1741-0444"],"issn-type":[{"value":"0140-0118","type":"print"},{"value":"1741-0444","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,12,27]]}}}