Measurement of the radiation e4fficiency of complex structures

Chérif, Raef; Atalla, Noureddine

doi:10.3397/1/376330

Cited by 5 publications

(2 citation statements)

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“…It is well known that the method described in the EN 12354-1 is not suitable for multilayer lightweight structures [18,19], with relatively small dimensions and various edge conditions: only approximate results are given with this method. However, many studies on the σ prediction of multilayer elements are being carried out [20] and this problem still requires much work to find reliable solutions for all the possible boundary conditions. Lightweight structures have a higher radiation efficiency than an infinite unbounded plate, due to the stiffening of the metal frame, or to the boundary conditions.…”

Section: Estimation Of Different Transmission Pathsmentioning

confidence: 99%

Sound Transmission between Rooms with Curtain Wall Façades: A Case Study

et al. 2015

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Curtain walls have reached good performances in terms of façade sound and thermal insulation, as well as solar protection. Nevertheless, the sound insulation performance of the partition between adjoining rooms with continuous curtain wall façades is often reduced by the presence of direct and flanking transmission through the junction with the façade itself.\ud In this work, flanking and direct structural transmissions are analysed with reference to the joints of the mullion of the curtain wall with lightweight plasterboard partitions. Airborne sound insulation and vibration measurements were made in two adjacent rooms affected by the acoustic problems determined by the curtain wall joint. Traditional acoustic measurements, carried out according to EN ISO 16283–1, highlighted problems in sound insulation between rooms, but without any indication on different sound transmission paths through the wall. Vibration measurements were made for every part of the system (frame columns and beams, window panes, plasterboard wall, plasterboard false ceiling, etc.) to better understand the sound transmission paths in these kinds of structures. In this paper the results of this analysis are presented. Moreover, taking into account previous works and measurements made in this research field, different solutions for curtain wall structures are analysed and technical suggestions are given to improve airborne sound insulation between rooms separated by partitions mounted up to metal frames

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Section: Estimation Of Different Transmission Pathsmentioning

confidence: 99%

Sound Transmission between Rooms with Curtain Wall Façades: A Case Study

et al. 2015

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“…Cherif and Atalla [5] developed a hybrid method to measure the radiation efficiency of complex structures across a wide frequency range. This technique combines direct measurements in an anechoic room with an indirect approach utilizing Statistical Energy Analysis (SEA) in a reverberant room.…”

Section: Introductionmentioning

confidence: 99%

Improving Measurement Accuracy of Sound Pressure in Vibrating Machines Using a Doosan Robot

Triki,

Cherif

2024

Preprint

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Measuring sound pressure is a complex and tedious task in industrial environments. Classical methods can be costly, inaccurate, and potentially dangerous for workers. Integrating robotics and computer vision into acoustic measurement processes offers an innovative solution to these problems. This paper uses a Doosan Robotic Vision System to investigate an innovative automatic acoustic sound pressure measurement solution. The Doosan robot, equipped with a scanning camera and microphone, captures acoustic data and produces a map of the machine’s acoustic radiation using computer vision algorithms. The measurement technique is accurate, efficient, and safe for workers. It can also be used for continuous monitoring of the industrial acoustic environment. The developed measurement method offers a promising way to automate acoustic measurement, which can be performed faster and with better accuracy to help industries improve their product sound quality and reduce noise levels. The method was compared to analytical predictions. A 3D acoustic mapping was conducted to visualize the spatial distribution of sound sources within the environment. The experimental results show a good correlation with the theory.

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