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Nyberg, Dan
Publications (6 of 6) Show all publications
Berg, J. & Nyberg, D. (2014). A qualitative approach to evaluation of perceived qualities of audio and video in a distance education context (ed.). Paper presented at . Acta Acoustica united with Acustica, 100(1), 154-165
Open this publication in new window or tab >>A qualitative approach to evaluation of perceived qualities of audio and video in a distance education context
2014 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 100, no 1, p. 154-165Article in journal (Refereed) Published
Abstract [en]

This study presents a qualitative method for collecting and analysing data to describe audio and video quality. Used in the social sciences, arts, and humanities, this approach relies on phenomenology and hermeneutics and uses interviews and questionnaires to assess the audio and video quality of master classes in classical music taught via the Internet. Although this study is only exploratory, it provides evidence that the method could successfully be used to gather descriptions of perceived qualities.

National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-7391 (URN)10.3813/AAA.918695 (DOI)000330557200017 ()2-s2.0-84892585054 (Scopus ID)5c33f7e6-f001-414e-949f-c01cc797693d (Local ID)5c33f7e6-f001-414e-949f-c01cc797693d (Archive number)5c33f7e6-f001-414e-949f-c01cc797693d (OAI)
Note
Validerad; 2014; 20140121 (johsod)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Berg, J., Bustad, C., Jonsson, L., Mossberg, L. & Nyberg, D. (2013). Perceived audio quality of realistic FM and DAB+ radio broadcasting systems (ed.). Paper presented at . A E S, 61(10), 755-777
Open this publication in new window or tab >>Perceived audio quality of realistic FM and DAB+ radio broadcasting systems
Show others...
2013 (English)In: A E S, ISSN 1549-4950, Vol. 61, no 10, p. 755-777Article in journal (Refereed) Published
Abstract [en]

The perceived audio quality of a digital broadcasting system such as DAB+ is dependent on what type of coding and bit rates are applied. Due to bandwidth constraints, audio quality is prone to be in conflict with other service demands such as the number of channels and the transfer of ancillary data. Compared to DAB+, several other audio services have superior bit rates that challenge the audio quality of DAB+. This paper reviews audio-quality criteria and investigates how the perceived audio quality of different broadcasting systems complies with the criteria. Two studies were conducted: Test 1 where DAB+ codecs were tested at bit rates between 96 and 192 kbit/s and Test 2 where DAB+ systems between 48 and 192 kbit/s as well as FM systems were tested. The systems in Test 2 were designed to as far as possible model a realistic broadcasting signal chain including commonly used dynamic processors. The studies were realized through two listening experiments using the ITU-R recommendations BS.1116 and BS.1534 (MUSHRA) followed by a closing interview. The results showed that the currently highest available subchannel bit rate for DAB+ (192 kbit/s) was insufficient for attaining perceptually transparent quality for critical items, whereas it enabled a quality comparable to or in some instances better than a modern FM system. Extrapolation of data indicates that critical items may need to be coded at even higher bit rates to reach perceptually transparent quality. From the interviews, auditory features important for the subjects’ assessment of quality were observed. This study concludes that when making decisions on broadcasting systems, it is important to have well-founded and clearly defined criteria for minimum acceptable quality and/or perceptually transparent quality.

National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-4349 (URN)248eb2a3-9177-4677-870f-24b0ed5482e2 (Local ID)248eb2a3-9177-4677-870f-24b0ed5482e2 (Archive number)248eb2a3-9177-4677-870f-24b0ed5482e2 (OAI)
Note
Validerad; 2013; 20131115 (johsod)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Nyberg, D. (2012). An investigation of qualitative research methodology for perceptual audio evaluation (ed.). (Licentiate dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>An investigation of qualitative research methodology for perceptual audio evaluation
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis investigates whether a qualitative research method, using phenomenological interviews and analysis, can be successfully applied to perceptual audio research, a field heretofore that has mainly used quantitative methods. The method is investigated by studying the types of information elicited by the method and the information’s usefulness and relevance to the conducted study. The qualitative method is applied in three different conditions: a non-experimental condition, an experimental condition, and an experimental condition using mixed-methods. The thesis also identifies implications associated with using a qualitative method in a quantitative field of research, implications that researchers should acknowledge and consider. All scientific criteria in which the quantitative research is judged cannot directly be applied to a qualitative method. A qualitative method has to be judged on its own framework, departure points, and scientific criteria. The information elicited from the qualitative method contains information that supports known knowledge and adds new knowledge. It supplements the accessibility to the subjects’ perceptions and used methods when conducting a perceptual evaluation task. In conclusion, a qualitative research method that consists of phenomenological interviews and analyses can be successfully applied in all the tested conditions.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2012. p. 118
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Keywords
Qualitative methods, Audio, Sound, Audio technology, Subjective assessment, Naive Listeners, Information technology - Other information technology, Ljudteknik, Kvalitativa metoder, Ljudkvalité, Lyssningstest, Informationsteknik - Övrig informationsteknik
National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-17438 (URN)366c71a8-18a3-4016-b80c-a1fddd24f3d2 (Local ID)978-91-7439-538-9 (ISBN)366c71a8-18a3-4016-b80c-a1fddd24f3d2 (Archive number)366c71a8-18a3-4016-b80c-a1fddd24f3d2 (OAI)
Note

Godkänd; 2012; 20121119 (dannyb); LICENTIATSEMINARIUM Ämne: Ljudteknik Examinator: Biträdande professor Jan Berg, Luleå tekniska universitet Diskutant: PhD, Senior Lecturer Natanya Ford, Bucks New University, United Kingdom Tid: Fredag den 18 januari 2013 kl 13.00 Plats: L165, Musikhögskolan Piteå, Luleå tekniska universitet

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved
Nyberg, D. (2011). Activity: Distance Learning (ed.). Paper presented at Distance Learning : 26/08/2011 - 27/08/2011. Paper presented at Distance Learning : 26/08/2011 - 27/08/2011.
Open this publication in new window or tab >>Activity: Distance Learning
2011 (English)Conference paper, Published paper (Other (popular science, discussion, etc.))
Keywords
Distance learning technology
National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-41754 (URN)c73203d1-a4ae-4272-9908-d4f1906e5b3b (Local ID)c73203d1-a4ae-4272-9908-d4f1906e5b3b (Archive number)c73203d1-a4ae-4272-9908-d4f1906e5b3b (OAI)
Conference
Distance Learning : 26/08/2011 - 27/08/2011
Note
Startdatum: 26/08/2011; Slutdatum: 26/08/2011; Roll: Talare; Typ: Föreläsning / muntligt bidragAvailable from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-24Bibliographically approved
(2011). Guitarra Negra for Guitar and Sextet. Paper presented at . Daphne Records
Open this publication in new window or tab >>Guitarra Negra for Guitar and Sextet
2011 (Swedish)Artistic output (Unrefereed) [Artistic work]
Abstract [sv]

Låt på skivan "Guitarra Negra" av Sebastián Caldas Zabellos Spår 17, tonsättare Sara Varas

Place, publisher, year, pages
Daphne Records, 2011
Keywords
Humanities and religion - Other humanities and religion, Konstnärligt arbete, Humaniora och religionsvetenskap - Övrig humaniora och religionsvetenskap
National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-33701 (URN)a0558a07-2d43-4930-a669-aaf9531acd2c (Local ID)a0558a07-2d43-4930-a669-aaf9531acd2c (Archive number)a0558a07-2d43-4930-a669-aaf9531acd2c (OAI)
Note

Godkänd; 2011; 20111124 (johsod)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-26Bibliographically approved
Berg, J. & Nyberg, D. (2008). Listener envelopment: what has been done and what future research is needed? (ed.). In: (Ed.), 124th Audio Engineering Society Convention 2008: Audio Engineering Society Convention Papers. Paper presented at Audio Engineering Society Convention : 17/05/2008 - 20/05/2008. Curran Associates, Inc., Article ID 7379.
Open this publication in new window or tab >>Listener envelopment: what has been done and what future research is needed?
2008 (English)In: 124th Audio Engineering Society Convention 2008: Audio Engineering Society Convention Papers, Curran Associates, Inc., 2008, article id 7379Conference paper, Published paper (Refereed)
Abstract [en]

In concert hall acoustics, the perceived spatial impression and/or spaciousness are characterized by the two attributesapparent source width (ASW) and listener envelopment (LEV). For LEV there are no clear consensus across theresults of previous work. This paper aims to discuss the research performed on LEV and how these research resultsare confirming or contradicting each other. There is a consensus on the arrival angle of the later sound energy and itsinfluence on LEV, whereas there is no clear agreement on the delay time and frequency content of the latereflections.

Place, publisher, year, edition, pages
Curran Associates, Inc., 2008
National Category
Other Humanities not elsewhere specified
Research subject
Audio Technology
Identifiers
urn:nbn:se:ltu:diva-30979 (URN)500e4ce0-c1ec-11dd-a054-000ea68e967b (Local ID)9781605602950 (ISBN)500e4ce0-c1ec-11dd-a054-000ea68e967b (Archive number)500e4ce0-c1ec-11dd-a054-000ea68e967b (OAI)
Conference
Audio Engineering Society Convention : 17/05/2008 - 20/05/2008
Note

Godkänd; 2008; 20081204 (johsod)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
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