Francesca Latorella - Academia.edu (original) (raw)
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Papers by Francesca Latorella
Proceedings of the ICA congress, 2019
The scaled reverberation room has proven to be an excellent tool for acoustic consultants and pro... more The scaled reverberation room has proven to be an excellent tool for acoustic consultants and professionals alike to carry out comparison tests between acoustic materials and 3D systems or structures. The suitability of a scaled reverberation room is currently under investigation for the evaluation of the frequency-dependent sound absorption. At present, no standard is available on the methods that could be used to derive acoustic absorption coefficients from scaled measurements. In this work practical aspects of ISO 354 have been investigated within a 1:5 scaled reverberation room: a balance has been sought between reducing sample size, to reduce the manufacturing costs of materials, and finding the appropriate sample area, thickness, orientation and edges treatment, to obtain reliable values at mid and high frequencies. Four different materials have been tested. The paper discusses some of the findings of the measurements conducted on the same materials in a full-scale reverberation room according to ISO 354, in a 1:5 scaled reverberation room and in an impedance tube according to ISO 10534-2. The absorption coefficients data collected have been effective in proving that small reverberation room tests can provide compatible results compared to standard ones in 400-5000 Hz frequency range.
Questo studio prende in considerazione la camera riverberante in scala 1:5 del Politecnico di Tor... more Questo studio prende in considerazione la camera riverberante in scala 1:5 del Politecnico di Torino per il calcolo del coefficiente di assorbimento acustico, caratteristica fondamentale che definisce la qualita di un materiale fonoassorbente, definito come il rapporto tra l'energia sonora assorbita dalla superficie e l’energia incidente. Ad oggi i metodi standardizzati per il calcolo dell'assorbimento acustico sono due: il metodo della camera riverberante (V>200m3) e quello del tubo di Kundt, o tubo di impedenza. Nel caso del tubo di Kundt i campioni testati hanno dimensioni minime (qualche centimetro di diametro), ma questa misura non fornisce sufficienti informazioni sul comportamento di assorbimento in campo diffuso poiche valuta solo l’incidenza perpendicolare delle onde, il che e rilevante poiche i campi sonori incontrati nella maggior parte delle applicazioni sono diffusi. La camera riverberante fornisce coefficienti di assorbimento maggiormente significativi poich...
Proceedings of the ICA congress, 2019
The scaled reverberation room has proven to be an excellent tool for acoustic consultants and pro... more The scaled reverberation room has proven to be an excellent tool for acoustic consultants and professionals alike to carry out comparison tests between acoustic materials and 3D systems or structures. The suitability of a scaled reverberation room is currently under investigation for the evaluation of the frequency-dependent sound absorption. At present, no standard is available on the methods that could be used to derive acoustic absorption coefficients from scaled measurements. In this work practical aspects of ISO 354 have been investigated within a 1:5 scaled reverberation room: a balance has been sought between reducing sample size, to reduce the manufacturing costs of materials, and finding the appropriate sample area, thickness, orientation and edges treatment, to obtain reliable values at mid and high frequencies. Four different materials have been tested. The paper discusses some of the findings of the measurements conducted on the same materials in a full-scale reverberation room according to ISO 354, in a 1:5 scaled reverberation room and in an impedance tube according to ISO 10534-2. The absorption coefficients data collected have been effective in proving that small reverberation room tests can provide compatible results compared to standard ones in 400-5000 Hz frequency range.
Questo studio prende in considerazione la camera riverberante in scala 1:5 del Politecnico di Tor... more Questo studio prende in considerazione la camera riverberante in scala 1:5 del Politecnico di Torino per il calcolo del coefficiente di assorbimento acustico, caratteristica fondamentale che definisce la qualita di un materiale fonoassorbente, definito come il rapporto tra l'energia sonora assorbita dalla superficie e l’energia incidente. Ad oggi i metodi standardizzati per il calcolo dell'assorbimento acustico sono due: il metodo della camera riverberante (V>200m3) e quello del tubo di Kundt, o tubo di impedenza. Nel caso del tubo di Kundt i campioni testati hanno dimensioni minime (qualche centimetro di diametro), ma questa misura non fornisce sufficienti informazioni sul comportamento di assorbimento in campo diffuso poiche valuta solo l’incidenza perpendicolare delle onde, il che e rilevante poiche i campi sonori incontrati nella maggior parte delle applicazioni sono diffusi. La camera riverberante fornisce coefficienti di assorbimento maggiormente significativi poich...