Measurement of airborne sound insulation of timber noise barriers: Comparison of in situ method CEN/TS 1793-5 with laboratory method EN 1793-2

Watts, G R; Morgan, P A

doi:10.1016/j.apacoust.2006.03.001

Cited by 12 publications

(11 citation statements)

References 4 publications

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“…According to CEN/TS 1793-5, windowing operations in the time domain are performed using a temporal window, called Adrienne temporal window, with the following specifications (see Figure 4):  a leading edge having a left-half Blackman-Harris shape and a total length of 0.5 ms ("pre-window") ;  a flat portion having a total length of 5.18 ms ("main body") ;  a trailing edge having a right-half Blackman-Harris shape and a total length of 2.22 ms. The total length of the Adrienne temporal window is , 7.9 W ADR T  ms. While this method had the great merit of opening the possibility of extensive checking of noise barriers on site just after their installation (see for example [7,8]), some points need to be further improved.…”

Section: DLmentioning

confidence: 99%

“…The total length of the Adrienne temporal window is , 7.9 W ADR T  ms. While this method had the great merit of opening the possibility of extensive checking of noise barriers on site just after their installation (see for example [7,8]), some points need to be further improved.…”

Section: DLmentioning

confidence: 99%

“…For in situ measurements, the European technical specification CEN/TS 1793-5 [1], based on the results of the former ADRIENNE project [5], has been a big step forward and it is currently used by several Member States [6][7][8][9][10][11][12], but some problems still remain to be addressed, especially for sound reflection (with the ADRI-ENNE procedure, sound reflection instead of sound absorption is measured, as of course the two are strictly correlated: the higher the sound absorption, the lower the…”

Section: Introductionmentioning

confidence: 99%

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Advancements in Sound Reflection and Airborne Sound Insulation Measurement on Noise Barriers

Guidorzi¹,

Garai²

2013

OJA

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The in-situ measurement of sound reflection and airborne sound insulation characteristics of a noise barrier in Europe are currently performed following the CEN/TS 1793-5 European standard guidelines (last revision published in 2003 [1]). After some years a large number of barriers measured, the original method has been significantly enhanced and validated in the frame of the EU funded QUIESST project, WP3 [2]. The sound reflection measurement method has been improved using a square 9-microphone grid not rigidly connected to the loudspeaker, an optimized alignment algorithm of free-field and reflected impulse responses, including fractional step shifts and least squares estimation of the best relative position, and a correction for geometrical divergence and sound source directivity. Each single measurement is then validated by means of the Reduction Factor calculation. The airborne sound insulation measurement method has not been markedly changed since 2003, because the procedure is robust and easily applicable as it is, but some problems may still be encountered when measuring highly insulating noise barriers, due to a poor signal to noise ratio of the transmitted impulse response. In those cases it is difficult to realize just after the measurement whether the obtained data are valid or not. A method, applicable on site, to overcome this problem is described here. It is based on the Signal to Noise Ratio estimation of critical parts of the acquired impulse responses and gives a strong validation criterion.

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Section: DLmentioning

confidence: 99%

Section: DLmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Advancements in Sound Reflection and Airborne Sound Insulation Measurement on Noise Barriers

Guidorzi¹,

Garai²

2013

OJA

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“…The research focused on designing a method for measuring the sound absorption and airborne sound insulation of noise reducing devices. Verification of the measurement method has been conducted [2,3] and a test standard initially released by the European Committee for Standardization (CEN) as CEN/TS 1793-5:2003 [4]. This standard was concerned with measuring both the sound reflection and airborne sound insulation; the measurement of the airborne sound insulation was later released individually as EN 1793-6:2012 and adopted by British Standards Institution [5].…”

Section: Introductionmentioning

confidence: 99%

“…Large scale testing programs have been conducted using CEN/TS 1793-5:2003, with the in situ results correlating well with laboratory measurements made using EN 1793-2:1997 [2,3,11]. Sound leakage will appear to degrade the performance of a noise reducing device when measurements are performed near air gaps, with the distance between the microphone and air gap having a significant effect on the apparent performance [11].…”

Section: Introductionmentioning

confidence: 99%