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Study of sound patterns and sound perception in electrified trucks
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Drift, underhåll och akustik. Scania CV AB.ORCID-id: 0009-0001-4291-9213
2024 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Luleå: Luleå tekniska universitet, 2024.
Serie
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
HSV kategori
Forskningsprogram
Teknisk akustik
Identifikatorer
URN: urn:nbn:se:ltu:diva-105811ISBN: 978-91-8048-595-1 (tryckt)ISBN: 978-91-8048-596-8 (digital)OAI: oai:DiVA.org:ltu-105811DiVA, id: diva2:1865273
Presentation
2024-09-26, A108, Luleå University of Technology, Luleå, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2024-06-05 Laget: 2024-06-04 Sist oppdatert: 2024-06-18bibliografisk kontrollert
Delarbeid
1. Loudness matching of complex tones simulating sounds from electric trucks
Åpne denne publikasjonen i ny fane eller vindu >>Loudness matching of complex tones simulating sounds from electric trucks
2024 (engelsk)Manuskript (preprint) (Annet vitenskapelig)
Abstract [en]

With electric powertrains quickly advancing in the heavy vehicle sector, there is an increasing interest in finding a general practice for evaluating the sound quality of the new sounds that these vehicles produce. Typical features are tonal sounds generated by the powertrain and components such as fans and pumps, causing combinations of complex tones when sounding simultaneously. 

Established methods for prediction of the perceived loudness of complex tone content, typically estimate the individual components one by one. The industry needs to understand how to evaluate loudness of complex tone content. In this study, the loudness perception of continuous complex tones with increasing number of harmonics as well as non-harmonic tone components, is assessed using pink noise as reference. 

The results show a statistically significant positive linear relationship between perceived loudness and increasing number of harmonics. Significant difference is seen between harmonic and non-harmonic tonal signals, when the second partial is detuned.

Increasing the number of tonal components increases the perceived loudness linearly. Non-harmonic complex tonal sounds are assessed less loud than the corresponding harmonic sounds. The results show that prediction models of loudness of complex tones must take the number of components and interrelationships of frequencies into account.

Emneord
tonal content, perception of complex tones, loudness estimation, electric vehicles
HSV kategori
Forskningsprogram
Teknisk akustik
Identifikatorer
urn:nbn:se:ltu:diva-105474 (URN)
Tilgjengelig fra: 2024-06-04 Laget: 2024-06-04 Sist oppdatert: 2024-06-04
2. Experimental case-study of sonic perception of first generation electric truck
Åpne denne publikasjonen i ny fane eller vindu >>Experimental case-study of sonic perception of first generation electric truck
2024 (engelsk)Manuskript (preprint) (Annet vitenskapelig)
HSV kategori
Forskningsprogram
Teknisk akustik
Identifikatorer
urn:nbn:se:ltu:diva-105475 (URN)
Tilgjengelig fra: 2024-06-04 Laget: 2024-06-04 Sist oppdatert: 2024-06-04

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12 2 of 2
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  • apa
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Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf