Measuring chain for field measurement of sound insulation and sound reflectivity of anti-noise fences
The equipment for field measurements of sound insulation and sound reflectivity of anti-noise fences is a measuring chain of several devices connected in a system. It contains a microphone, a measuring grid for the installation of measuring microphones, a modular precision sound analyzer, a loudspeaker, a power amplifier for the loudspeaker and a laptop computer with installed software for measuring the impulse response. The measuring chain is intended for field measurement of the sound insulation of anti-noise fences according to the SIST EN 1793-6 standard and the sound reflectivity of anti-noise fences according to the SIST EN 1793-5 standard. The modular precision sound analyzer records the sound isolation and reflectivity of the noise barrier via a microphone, which is placed in 9 different places on the measuring grid. The sound source is a speaker, which is placed on the opposite side of the fence when measuring insulation, and on the same side of the fence as the microphone when measuring reflectivity. With the measuring chain, it is possible to measure the sound isolation of DLSI over 60 dB and the sound reflectivity of DLRI up to around 8 dB. The analysis of the results is performed with the dedicated Brüel & Kjær Dirac software. Access to the equipment is possible by prior arrangement.
The price of the investigation depends on the complexity of the experiment.