Naslov
Acoustic performance of large parallel baffled silncers by using in-situ measurement method

Autori
Petošić, Antonio ; Grubeša, Sanja ; Šodolović, Slobodan ; Franček, Petar

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The 8th Congress of the Alps Adria Acoustics Association – Conference Proceedings / Horvat, Marko ; Krhen, Miljenko - Zagreb : Hrvatsko akustičko društvo (HAD), 2018, 134-138

ISBN
978-953-95097-2-7

Skup
The 8th Congress of the Alps Adria Acoustics Association

Mjesto i datum
Zagreb, Hrvatska, 20.09.2018. - 21.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
parallel baffled silencers, insertion and transmission loss, artificial and real sound source, sound pressure distribution inside the baffles

Sažetak
In this research, acoustic parameters of six different configurations of parallel baffled silencers have been compared by using in-situ measurement method according to ISO-11820:1996 standard. The geometrical (length, thickness and distance between baffles) and absorption parameters of baffles have been changed (full absorption and half-absorption surface) and their influence on the silencer performance in channel without and with flow have been measured. Transmission and insertion loss acoustic parameters in octave frequency bands from 63 Hz up to 16 kHz are determined in the in-istu measurement setup with influence of the reflections from baffles at inlet side and opening at outlet side. Also, analytical expressions (Piening and trapezoidal equation) for one parallel baffled silencer’s configuration have been compared with measurement values on octave bands of interest. The sound pressure distribution between baffles has been also measured and it is evident that there SPL change at the beginning is much larger compared to the value at the end of silencer

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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