Akustische Verfahren zur Ermittlung der Luftdichtheit von Bestandsgebäuden

Holstein, Peter; Bader, Nicki; Moeck, Steffen; Münch, Hans-Joachim; Döbler, Dirk; Jahnke, Alexander

doi:10.1007/978-3-658-28753-5_8

Cited by 2 publications

(2 citation statements)

References 1 publication

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“…In this context, Raman et al [26] utilized beamforming and nearfield acoustic holography to detect and quantify leaks from a single window and door. Further studies [27,28] have focused on investigating single parts of building envelopes (e.g., single windows or doors) using microphone arrays and beamforming.…”

Section: Introductionmentioning

confidence: 99%

Field Testing of an Acoustic Method for Locating Air Leakages in Building Envelopes

Schiricke,

Diel,

Kölsch

2024

Buildings

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Maintaining the airtightness of building envelopes is critical to the energy efficiency of buildings, yet leak detection remains a significant challenge, particularly during building refurbishment. This study addresses the effectiveness of the acoustic beamforming measurement method in identifying leaks in building envelopes. For this reason, an in-field study employing the acoustic beamforming measurement method was conducted. The study involved testing over 30 rooms across three different multi-story office buildings of varying ages and heterogeneous envelope structures. Numerous leaks were located in the façades, which were subsequently visually confirmed or even verified with smoke sticks. The data, captured using an acoustic camera (a microphone ring array), revealed distinct spectra that indicate the method’s potential for further research. The basic functionality and the significant potential of this methodology for localizing leakages in large buildings were proven.

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Section: Introductionmentioning

confidence: 99%

Field Testing of an Acoustic Method for Locating Air Leakages in Building Envelopes

Schiricke,

Diel,

Kölsch

2024

Buildings

View full text Add to dashboard Cite

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“…Several other studies examined the sound transmission losses through the building envelope in both laboratory [24][25][26][27] and field testing [28][29][30] to quantify leakage sizes with some success. In addition to the range of audible sound, Graham [31] considered infrasonic impedance measurements for leakage determination, whereas other authors focused on ultrasonic frequencies for localizing [32][33][34] and quantification [35,36] of air leakages in buildings. Ultrasonic frequencies have the advantage of being above the human auditory threshold of hearing, which may not disturb inhabitants in buildings during measurement.…”

Section: Introductionmentioning

confidence: 99%

Quantification of air leakage paths: a comparison of airflow and acoustic measurements

Kölsch

Walker

Schiricke

et al. 2021

International Journal of Ventilation

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Today, the fan pressurization method is the most frequently used method to evaluate a buildings' airtightness. However, the localization and quantification of leaks remain difficult. In this paper, an acoustic method is introduced to estimate the leakage size of single leaks.Acoustic and airflow measurements were conducted and compared in laboratory tests within the same boundary conditions. This work aims to investigate if various leak sizes can be predicted using acoustic measurement methods. The test apparatus consists of two chambers, separated by a test wall. This wall represents a single characteristic air leakage path. Various types of wall structures with different slit geometries, wall thicknesses, and insulation materials were investigated. The acoustic measurements were performed with a sound source placed in one chamber and ultrasonic microphones located in both chambers. These results were compared to measured airflows through the test wall to provide estimates of uncertainty in the acoustic approach, which indicate a linear trend. Finally, these laboratory measurements were compared to the same measurements at a real office building. Although the acoustic measurement uncertainty is still significant (greater than +/-50 %), the acoustic method has the potential to give an order of magnitude of single leak sizes.

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Akustische Verfahren zur Ermittlung der Luftdichtheit von Bestandsgebäuden

Cited by 2 publications

References 1 publication

Field Testing of an Acoustic Method for Locating Air Leakages in Building Envelopes

Field Testing of an Acoustic Method for Locating Air Leakages in Building Envelopes

Quantification of air leakage paths: a comparison of airflow and acoustic measurements

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