CERCETARI IN SITU PRIVIND CAPACITATEA DE IZOLARE ACUSTICA A PANOURILOR FONOIZOLANTE OBTINUTE DIN COPOLIMER ACRILONITRIL BUTADIEN STIREN (ABS)
Autor/autori: Prof. univ. emerit dr. ing. dr. h. c. Ioan CURTU, Sef lucrari dr. ing. Mariana Domnica STANCIU
Rezumat: Lucrarea prezinta rezultatele cercetarilor experimentale privind determinarea indicelui de izolarea acustica a unui nou tip de material compozit obtinut prin presarea la cald a aschiilor rezultate in urma prelucrarilor mecanice a pieselor din copolimer acrilonitril butadien stiren (ABS). In cadrul testelor experimentale s-a urmarit: influenta distantei dintre sursa si bariera acustica realizata din material compozit pe baza de ABS; influenta nivelului de zgomot emis de sursa; influenta distantei dintre bariera si receptori aflati intr-o pozitie coliniara cu sursa; influenta pozitiei receptorilor fata de capetele laterale ale barierei; influenta unghiului barierei acustice fata de planul vertical de simetrie. Valorile determinate experimental incadreaza aceste materiale compozite in clasele de absorbtie B si C pe un domeniu de frecvente cuprins intre 600 – 2000 Hz, facandu-le comparabile cu compozitele biodegradabile cu insertii textile.
Cuvinte cheie: performanta acustica, compozite, deseuri, bariera sonora
Abstract: This paper presents the results of experimental research on the determination of the acoustic insulation of a new type of composite material obtained by hot pressing of chips resulting from mechanical processing of acrylonitrile butadiene styrene (ABS) parts. In experimental tests followed: the influence of the distance between source and noise barrier made of composite material based on ABS; the influence of the noise level emitted by the source; influence of distance between barrier and receptors placed collinear with the source; influence of receptors position regarding to lateral ends of the barrier; influence of barrier angle from the vertical plane of symmetry. Experimentally values within the composite absorption in classes B and C over a frequency range of 600 - 2000 Hz, making them comparable to biodegradable textile
Keywords: acoustic performance, composite, waste, sound barrier