Revision of international standards on field measurements of airborne, impact and facade sound insulation to form the ISO 16283 series

Hopkins, Carl

doi:10.1016/j.buildenv.2015.05.043

Cited by 16 publications

(9 citation statements)

References 15 publications

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“…This protocol was adopted in the revision of international standards on field measurements of airborne, impact and facade sound insulation for room volume below 25 m 3 . In his work on this topic Hopkins [20], presenting the main technical changes concerning the new ISO 16283 [21] series, described the low-frequency procedure for one-third octave bands below 100 Hz for rooms with volumes below 25 m 3 using additional corner measurements to determine the spatial average sound pressure level and using the 63 Hz octave band rather than one-third octave bands to measure the reverberation time. The choice of the room volume below 25 m 3 for the application of the low-frequency procedure in the new standards, instead of 50 m 3 as for the previous reference indications [19], was made more for practical than for scientific reasons.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Uncertainty of facade sound insulation by a Round Robin Test. Evaluations of low-frequency procedure and single numbers

Scrosati

Scamoni

Prato

et al. 2016

Building and Environment

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The international standard ISO 140-5 for the measurement of the sound insulation of building facades has been recently replaced by the new standard ISO 16283-3. The revised standard includes the procedure for measurements at low frequencies down to 50 Hz. The uncertainty of facade sound insulation, in particular at low frequencies, was evaluated by a Round Robin Test, conducted in a full-scale experimental building at the Construction Technologies Institute of the National Research Council of Italy (ITC-CNR). Each of the 10 teams involved in the RRT replicated the tests 5 times, for a total of 50 measurements. The different measurement positions inside the receiving room were compared. In particular, all the teams involved in the RRT followed the low-frequency procedure, assessing corner and center room positions; the energy average values according to ISO 16283-3 were considered and the relative uncertainty, in terms of repeatability and in situ reproducibility standard deviations, was compared with the ones measured and calculated following the default measurement procedure. It was found that the uncertainty of the low-frequency procedure is higher than that of the default procedure. This would suggest the need to investigate further the reliability of the low-frequency procedure. At high frequency, the significant uncertainty values found are probably caused by the loudspeakers directivity and position; this aspect need to be investigated in greater detail, as well

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Section: Accepted Manuscriptmentioning

confidence: 99%

Uncertainty of facade sound insulation by a Round Robin Test. Evaluations of low-frequency procedure and single numbers

Scrosati

Scamoni

Prato

et al. 2016

Building and Environment

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“…This gave the authors an opportunity to consider whether it might be advantageous to determine relationships between transmission loss (rather than K ij ) and the ratio of characteristic moment impedances, from which K ij could subsequently be calculated. There was an additional impetus to introduce relationships for K ij that were relevant to the low-frequency range (particularly below 100 Hz) because of recent changes to European and International standards on field sound insulation measurement which introduced a new low-frequency procedure in order to allow more repeatable and reproducible measurements [19].…”

Section: Introductionmentioning

confidence: 99%

Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory

et al. 2016

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Sound insulation prediction models in European and International standards use the vibration reduction index to calculate flanking transmission across junctions of walls and floors. These standards contain empirical relationships between the ratio of mass per unit areas for the walls/floors that form the junction and a frequency-independent vibration reduction index. Calculations using wave theory show that there is a stronger relationship between the ratio of characteristic moment impedances and the transmission loss from which the vibration reduction index can subsequently be calculated. In addition, the assumption of frequency-independent vibration reduction indices has been shown to be incorrect due to in-plane wave generation at the junction. Therefore numerical experiments with FEM, SFEM and wave theory have been used to develop new regression curves between these variables for the low-, mid- and high-frequency ranges. The junctions considered were L-, T- and X-junctions formed from heavyweight walls and floors. These new relationships have been implemented in the prediction models and they tend to improve the agreement between the measured and predicted airborne and impact sound insulation.Peer ReviewedPostprint (author's final draft

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“…In this paper, a methodology is proposed for transmission function measurements by considering the feasibility and implications of using steady-state and transient excitation on lightweight building structures. As building machinery tends to have significant low-frequency structure-borne sound power, this proposal incorporates the low-frequency procedure [29] used for field measurements of sound insulation [30,31] and in ISO 16032 [32] used for the assessment of service equipment installations in existing buildings. Experimental work on a timber-frame junction in the laboratory is used to investigate the influence of excitation position on the measured transmission function.…”

mentioning

confidence: 99%

“…For receiving room volumes smaller than 25 m 3 in one-third octave bands below 100 Hz, the lowfrequency procedure used in ISO 16283-1 can be followed where the reverberation time is measured in the 63 Hz octave band to represent the 50, 63 and 80 Hz one-third octave bands [31]. For larger room volumes where room modes occur at frequencies down to the 20 Hz one-third octave band, then the 31.5 Hz octave band could be used to represent the 25, 31.5 and 40 Hz one-third octave bands respectively (and potentially the 20 Hz one-third octave band).…”

mentioning

confidence: 99%

Measurement of Transmission Functions in Lightweight Buildings for the Prediction of Structure-Borne Sound Transmission From Machinery

Schöpfer¹,

Hopkins²,

Mayr³

et al. 2017

Acta Acustica united with Acustica

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This paper develops and assesses protocols for the 2 measurement of transmission functions in lightweight 3 buildings. A transmission function is defined that 4 relates the spatial-average sound pressure level in a 5 room to the structure-borne sound power injected into 6 a wall or floor. The intention is to facilitate the pre-7 diction of structure-borne sound transmission from 8 machinery to receiving rooms. Errors in the mea-9 surement of the power input can be reduced by using 10 a pair of accelerometers on either side of the excita-11 tion point rather than a single accelerometer on one 12 side. Laboratory measurements on a timber-frame 13 wall indicate that steady-state excitation using an 14 electrodynamic shaker and transient excitation with a 15 force hammer can be considered as equivalent. Mea-16 sured transmission functions from a laboratory test 17 construction below 500 Hz are found not to be signifi-18 cantly affected by the choice of excitation position be-19 ing directly above a stud or in a bay. Laboratory and 20 field results on different timber-frame walls indicate 21 that with transient excitation using a force hammer, 22 the transmission function is measurable in vertically-, 23 horizontally-and diagonally-adjacent receiving rooms 24 over the frequency range from 20 to 1 k Hz. The ap-25 proach has been applied in field measurements which 26 indicate that there is potential to create databases of 27 average transmission functions as a simplified predic-28 tion tool for sound pressure levels from service equip-29 ment in buildings.

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Revision of international standards on field measurements of airborne, impact and facade sound insulation to form the ISO 16283 series

Cited by 16 publications

References 15 publications

Uncertainty of facade sound insulation by a Round Robin Test. Evaluations of low-frequency procedure and single numbers

Uncertainty of facade sound insulation by a Round Robin Test. Evaluations of low-frequency procedure and single numbers

Regression curves for vibration transmission across junctions of heavyweight walls and floors based on finite element methods and wave theory

Measurement of Transmission Functions in Lightweight Buildings for the Prediction of Structure-Borne Sound Transmission From Machinery

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