Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Fredrik Ljunggren"'
Autor:
Fredrik Ljunggren
Publikováno v:
Developments in the Built Environment, Vol 13, Iss , Pp 100117- (2023)
Building with cross laminated timber (CLT) has gain increased interest over the last years, but in common to other wood-based building systems, inadequate low-frequency sound insulation is seen as a problem. This paper deals with two methods to impro
Externí odkaz:
https://doaj.org/article/678e284fe1e847319b8a8478f851f201
Publikováno v:
Noise Control Engineering Journal. 70:298-308
An important part of evaluating impact sound insulation is to measure the reverberation time in the receiving room. The increasing trend of using wooden structures for residential buildings has made it increasingly important to have control of the me
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34335ab6b713a2fcb68e3909d244a67a
https://doi.org/10.3397/1/377024
https://doi.org/10.3397/1/377024
Publikováno v:
Public Transport. 13:597-623
We present an algorithm to insert a train path in an existing railway timetable close to operation, when we want to affect the existing (passenger) traffic as little as possible. Thus, we consider all other trains as fixed, and aim for a resulting tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46f2eed74fc6e1eaaced812918b98d92
https://doi.org/10.1007/s12469-020-00253-x
https://doi.org/10.1007/s12469-020-00253-x
Publikováno v:
Building and Environment. 223:109480
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b451d0beb1835008f028b6f814ad476c
https://doi.org/10.1016/j.buildenv.2022.109480
https://doi.org/10.1016/j.buildenv.2022.109480
Autor:
Fredrik Ljunggren, Christian Simmons
Publikováno v:
Applied Acoustics. 197:108955
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0819dc8677986a3da661c95d8d2207f
https://doi.org/10.1016/j.apacoust.2022.108955
https://doi.org/10.1016/j.apacoust.2022.108955
Publikováno v:
Applied Acoustics. 135:1-7
There is a need to develop single number quantities (SNQ) of impact sound insulation that correlate better with walking sound annoyance. Previous research has indicated that impact sound insulation should be evaluated from 20 Hz in lightweight constr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3d1501f53ef5ae4107427fa27be61f0
https://doi.org/10.1016/j.apacoust.2018.01.019
https://doi.org/10.1016/j.apacoust.2018.01.019
Autor:
Christian Simmons, Fredrik Ljunggren
Publikováno v:
Applied Acoustics. 133:58-63
It has for long been debated whether 50 or 100 Hz is the proper lower frequency limit when evaluating airborne sound insulation between dwellings. Although 100 Hz is the lowest third-octave band wi ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::983f4eb28bdd26d73664044dc8c34725
https://doi.org/10.1016/j.apacoust.2017.12.017
https://doi.org/10.1016/j.apacoust.2017.12.017
Publikováno v:
Applied Acoustics. 123:143-151
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1b3a3691d12e57288502c0a4977d99b
https://doi.org/10.1016/j.apacoust.2017.03.014
https://doi.org/10.1016/j.apacoust.2017.03.014
Uncertainty of in situ low frequency reverberation time measurements from 20 Hz - An empirical study
Publikováno v:
Noise Control Engineering Journal. 64:706-715
Measuring reverberation time is normally one of the steps within the procedure of determining sound insulation in dwellings where 100 or 50 Hz usually serves as the lower frequency limit. However, ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c199185587b5da8c6bda24d50710c5d
https://doi.org/10.3397/1/376413
https://doi.org/10.3397/1/376413
Publikováno v:
Applied Acoustics. 85:57-68
Traditionally, multi-family houses have been constructed using heavy, homogenous materials like concrete and masonry. But as a consequence of the progress of lightweight building systems during the last decades, it has been questioned whether standar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01a18718cc1185e76efa23e1f2ea6d96
https://doi.org/10.1016/j.apacoust.2014.04.003
https://doi.org/10.1016/j.apacoust.2014.04.003