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Transmission loss measurement of recycled granular material using wave decomposition by impulse response extraction based on deconvolution
ID
Železnik, Anže
(
Avtor
),
ID
Murovec, Jure
(
Avtor
),
ID
Čurović, Luka
(
Avtor
),
ID
Cerkovnik, Nejc
(
Avtor
),
ID
Prezelj, Jurij
(
Avtor
)
PDF - Predstavitvena datoteka,
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(2,04 MB)
MD5: 5E8764E043D2E3ADCD273A7A7782C749
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S0003682X23002967
Galerija slik
Izvleček
A simplified method for measuring transmission loss with a single fixed microphone inside an impedance tube is proposed. The separation of the incident wave from the reflected wave is achieved by deconvolving the loudspeaker driver voltage signal with the microphone signal to extract the impulse response. Random noise and a sinusoidal sweep signal were used as excitation signals for extraction of the impulse response, and two deconvolution methods were employed: linear deconvolution based on the adaptive LMS algorithm and simple spectral division. To avoid the overlap of incident and reflected pulses, a long impedance tube was used. Using a long impedance tube eliminates the need for an anechoic tube termination and the need to calibrate microphones. It is found that a reflective tube termination provides more accurate results compared to an approximately anechoic termination. The approximately anechoic termination shortens the available time window of the reflected pulse because it reflects some of the low-frequency sound. The standard deviation of the results and the dynamic range of the proposed method were determined experimentally. The applicability of the new method was tested on samples of unconsolidated granular material recycled from construction sites. The measured transmission losses of the different granular fractions were compared with a theoretical model for transmission losses at low frequencies. Samples consisting of smaller granule fractions were found to have surprisingly high transmission loss values. The design of the extended vertical impedance tube in combination with the proposed method is cost effective, speeds up the measurement procedure and provides reliable results.
Jezik:
Angleški jezik
Ključne besede:
transmission loss
,
impedance tube
,
pulse separation
,
wave decomposition
,
deconvolution
,
granular materials
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2023
Št. strani:
10 str.
Številčenje:
Vol. 211, art. 109498
PID:
20.500.12556/RUL-149724
UDK:
534:62-492
ISSN pri članku:
0003-682X
DOI:
10.1016/j.apacoust.2023.109498
COBISS.SI-ID:
163841027
Datum objave v RUL:
08.09.2023
Število ogledov:
531
Število prenosov:
72
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Objavi na:
Gradivo je del revije
Naslov:
Applied acoustics
Skrajšan naslov:
Appl. acoust.
Založnik:
Elsevier
ISSN:
0003-682X
COBISS.SI-ID:
24982016
Licence
Licenca:
CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:
Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
prenosne izgube
,
impedančna cev
,
ločevanje pulzov
,
valovna dekompozicija
,
dekonvolucija
,
granulirani materiali
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0401
Naslov:
Energetsko strojništvo
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