Determining radiated sound power of building structures by means of laser Doppler vibrometry

Roozen, N.B.; Labelle, Ludovic; Rychtáriková, Monika; Glorieux, Christ

doi:10.1016/j.jsv.2015.02.029

Cited by 31 publications

(30 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The discussed revision of the method to characterise sound insulation properties of building elements and buildings is not only intended to lead to a simplification by minimizing the existing large number of single number quantities, but it has also been suggested to take the extended frequency range between 50 Hz and 100 Hz into account by default, rather than only as an option. Several researchers have therefore been working on the development of suitable measuring [12,13,14] and prediction methods [15,16,17,18], others have focused on the subjective assessment of sound insulation and on ways to perform listening tests [19,20,21,22,23,24,25,26,27].…”

Section: Introductionmentioning

confidence: 99%

Perceived Loudness of Neighbour Sounds Heard Through Heavy and Light-Weight Walls with Equal Rw + C50–5000

Rychtáriková¹,

Muellner²,

Chmelik³

et al. 2016

Acta Acustica united with Acustica

View full text Add to dashboard Cite

SummaryThis article presents a perceptual comparison of the loudness of a large range of 64 different typical "living room" sounds transmitted through two different walls: (1) a light-weight wall, composed of gypsum boards mounted on metal "C" studs and (2) a heavy-weight wall, built out of lime sand bricks plastered on one side. The two walls had different (laboratory measured) sound insulation spectra, but their Rw + C50−5000 rating was the same: 52 dB. Compared to the heavy-weight wall, the massspring-mass-type light-weight wall had better sound insulation properties in the middle frequency range and worse at low frequencies below 100 Hz and above 3150 Hz. Listening subjects had to choose the loudest stimuli between a pair of sounds (as transmitted through the lightweight and the masonry wall) presented through headphones in random order with one repetition, following a two-alternative forced choice (2AFC) procedure. Two sets of listening tests were conducted in this study, playing stimuli at realistic sound level and on artificially overall increased level. The listening experiments revealed significant differences in subjective assessment between the two types of acoustic insulation. The results also infer that the discussed single number rating does not adequately correspond with people's perception.

show abstract

Section: Introductionmentioning

confidence: 99%

Perceived Loudness of Neighbour Sounds Heard Through Heavy and Light-Weight Walls with Equal Rw + C50–5000

Rychtáriková¹,

Muellner²,

Chmelik³

et al. 2016

Acta Acustica united with Acustica

View full text Add to dashboard Cite

show abstract

“…Successful applications have been found in automotive [108], aerospace [109], machine design [110] Velocity magnitude (mm/s/Pa) and construction [111] systems.…”

Section: Acousticsmentioning

confidence: 99%

An international review of laser Doppler vibrometry: Making light work of vibration measurement

Rothberg

Allen

Castellini

et al. 2017

Optics and Lasers in Engineering

325

153

View full text Add to dashboard Cite

In 1964, just a few years after the invention of the laser, a fluid velocity measurement based on the frequency shift of scattered light was made and the laser Doppler technique was born. This comprehensive review paper charts advances in the development and applications of laser Doppler vibrometry (LDV) since those first pioneering experiments. Consideration is first given to the challenges that continue to be posed by laser speckle. Scanning LDV is introduced and its significant influence in the field of experimental modal analysis described. Applications in structural health

show abstract

“…There are plenty of publications about that, even publications describing how to determine sound transmission loss by neglecting the impact of sound transmission chambers. Some recent examples are [52][53][54][55].…”

Section: Cutoff Frequencymentioning

confidence: 99%

Characterization of New Sustainable Acoustic Solutions in a Reduced Sized Transmission Chamber

et al. 2019

View full text Add to dashboard Cite

In order to assess the airborne sound insulation of a new material or building solution, access to standardized laboratories, large and expensive facilities, and a sample area of at least 10 m2 are required. At the research and development stages of new sustainable acoustic materials for construction, it is not easy to make large sample areas available. Moreover, the financial investment in acoustic testing of materials during the research stage in standardized laboratories is excessive. In this work, the assessment of the airborne sound insulation of multi-layer partitions designed with new sustainable materials is presented. The assessed solutions are formed by green composite fiber boards as lightweight elements and a new material designed from sheep wool as absorbent material. The results of these 100% recyclable solutions are compared with lightweight element based solutions, which are commonly used for acoustic insulation. Characterization of those new sustainable solutions for building is leveraged in a reduced sized transmission chamber. The design, construction, and validation of this kind of laboratory are provided. This laboratory enables the assessment of the airborne sound insulation of a material in its research stage.

show abstract

Determining radiated sound power of building structures by means of laser Doppler vibrometry

Cited by 31 publications

References 21 publications

Perceived Loudness of Neighbour Sounds Heard Through Heavy and Light-Weight Walls with Equal <I>R</I><SUB>w</SUB> + <I>C</I><SUB>50</SUB><SUB>–</SUB><SUB>5000</SUB>

Perceived Loudness of Neighbour Sounds Heard Through Heavy and Light-Weight Walls with Equal <I>R</I><SUB>w</SUB> + <I>C</I><SUB>50</SUB><SUB>–</SUB><SUB>5000</SUB>

An international review of laser Doppler vibrometry: Making light work of vibration measurement

Characterization of New Sustainable Acoustic Solutions in a Reduced Sized Transmission Chamber

Contact Info

Product

Resources

About