Sound Insulation of Doors—part 2: Comparison Between Measurement Results and Predictions

Hongisto, Valtteri; Keränen, Jukka; Lindgren, Magnus

doi:10.1006/jsvi.1999.2610

Cited by 35 publications

(28 citation statements)

References 3 publications

(19 reference statements)

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“…In [12,13] airborne (structure path) and slit sound transmission models are applied in order to predict the insulation capacity of doors. This is the balance of two transmission paths: through the door itself and through the slits between the door and the surroundings (typically the floor).…”

Section: Introductionmentioning

confidence: 99%

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Modal-based prediction of sound transmission through slits and openings between rooms

Poblet-Puig

Ferran

2013

Journal of Sound and Vibration

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The transmission of sound through slits and openings between cuboid-shaped rooms is analysed. A deterministic model that describes the pressure fields inside the rooms in terms of eigenfunctions and uses the Dirichlet-to-Neumann technique in order to reproduce the slit effect is presented. An efficient formulation of the problem is obtained thanks to the splitting of the original domain into three domains: sending room, slit, receiving room. The geometry and boundary conditions of the problem can be modelled in detail like in an element-based numerical technique (such as the finite element method) but with smaller computational costs. The model is compared with numerical solutions, existent models and published experimental data. Afterwards it is used to analyse some aspects such as the influence of slit dimensions, opening position, room properties (dimensions and absorption) that cannot be taken into account with the available models. These usually suppose that the slit or opening connects two unbounded acoustic domains.

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Section: Introductionmentioning

confidence: 99%

“…The laboratory measurements reveal quite good agreement with the models. One of the main conclusions of the work [12,13] is that it is necessary to consider the slit path for a correct characterisation of the doors. The importance of the mounting procedures and quality control is illustrated by [17].…”

Section: Introductionmentioning

confidence: 99%

Modal-based prediction of sound transmission through slits and openings between rooms

Poblet-Puig

Ferran

2013

Journal of Sound and Vibration

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“…Their experimental results agreed very well with the Wilson-Soroka (1965) approximate model for circular apertures and with the Gomperts-Kihlman (1967) model for slit-shaped apertures. Hongisto et al (2000a) applied Gomperts' model to calculate the sound reduction index (SRI) of one steel door with a slit-shaped aperture at the door's bottom. His results showed that the measured SRI curve conformed to the calculated SRI curve below the slit resonance frequency, but the position of the slit resonance frequency was not correct.…”

Section: Introductionmentioning

confidence: 99%

In-situ Sound Insulation Performance of Interior Doors with Slit-shaped Apertures

Kim

2012

Journal of Asian Architecture and Building Engineering

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In a building, doors are one of the weakest building elements regarding sound insulation, which is mainly due to inevitable sound leaks. Although there are some studies based on laboratory experiments, the influence of the aperture on the sound insulation performance under real building conditions have rarely been discussed. This work focused on the total sound insulation of doors with slit-shaped apertures at the bottom. Both in-situ measurements and theoretical predictions were performed on 30 interior doors. The total sound insulation through the door leaf and the aperture was acquired by measurement, and the relationship between the sound insulation performance and the width of aperture was found. The predictions on the total sound insulation were calculated by Gomperts' theory, and were compared with the in-situ measurements. In addition, the effects and the limits of m and n, the numbers indicating the incidence sound field and the aperture position, on prediction were investigated. Accordingly, the proper numbers of m and n were recommended for better prediction of the sound insulation of interior doors.

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“…Most participants are unable to precisely declare these building physical factors precisely. Even if they could, the sound leaks in the facade may significantly affect the sound transmission loss (Hongisto et al, 2000). In addition, sound can also transmit indoors through the facade elements not facing the wind power area.…”

Section: B Wind Power Areasmentioning

confidence: 99%

Indoor noise annoyance due to 3–5 megawatt wind turbines—An exposure–response relationship

Hongisto¹,

Oliva²,

Keränen³

2017

The Journal of the Acoustical Society of America

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The existing exposure–response relationships describing the association between wind turbine sound level and noise annoyance concern turbine sizes of 0.15–3.0 MW. The main purpose of this study was to determine a relationship concerning turbines with nominal power of 3–5 MW. A cross-sectional survey was conducted around three wind power areas in Finland. The survey involved all households within a 2 km distance from the nearest turbine. Altogether, 429 households out of 753 participated. The households were exposed to wind turbine noise having sound levels within 26.7–44.2 dB LAeq. Standard prediction methods were applied to determine the sound level, LAeq, in each participant's yard. The measured sound level agreed well with the predicted sound level. The exposure–response relationship was derived between LAeq outdoors and the indoor noise annoyance. The relationship was in rather good agreement with two previous studies involving much smaller turbines (0.15–1.5 MW) under 40 dB LAeq. The Community Tolerance Level (CTL), CTL20 = 50 dB, was 3 dB lower than for two previous studies. Above 40 dB, a small number of participants prevented a reliable comparison to previous studies.

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Sound Insulation of Doors—part 2: Comparison Between Measurement Results and Predictions

Cited by 35 publications

References 3 publications

Modal-based prediction of sound transmission through slits and openings between rooms

Modal-based prediction of sound transmission through slits and openings between rooms

In-situ Sound Insulation Performance of Interior Doors with Slit-shaped Apertures

Indoor noise annoyance due to 3–5 megawatt wind turbines—An exposure–response relationship

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