Temat: Noise reduction - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Noise Reduction of Spiral Ducts
Autorzy:: Łapka, W.
Cempel, C.
Powiązania:: https://bibliotekanauki.pl/articles/90374.pdf
Data publikacji:: 2007
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: spiral duct
noise reduction
sound propagation
computational modeling
Opis:: The paper presents noise reduction (NR) of spiral ducts as a result of computational modeling of acoustic wave propagation. Three-dimensional models were created with the finite element method in COMSOL Multiphysics version 3.3. Nine models of spiral ducts with 1–9 spiral leads were considered. Time-harmonic analysis was used to predict NR, which was shown in spectral and interval frequency bands. Spiral duct performance can be seen as a comparison of NR before and after a change from a circular to a spiral duct.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 419-426
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: An Adaptive System for Active Noise Reduction
Autorzy:: Makarewicz, G.
Matuszewski, G.
Morzyński, L.
Zawieska, W.
Powiązania:: https://bibliotekanauki.pl/articles/90095.pdf
Data publikacji:: 2000
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: noise reduction
active cancellation
adaptive system
low frequency noise
warunki pracy
system adaptacyjny
redukcja szumu
Opis:: An adaptive system for active noise reduction in an acoustic duct is presented. The system is based on a modification of a least mean square (LMS) algorithm called filtered-U with on-line error path modelling. The system was assembled and examined on a laboratory test stand in the Laboratory of Active Noise Reduction Methods of the Central Institute for Labour Protection (Warsaw, Poland). The structure of the stand, the block structure of the active noise reduction system, the basic assumption concerning the applied adaptive algorithm, and examples of measured effectiveness of the system for various kinds of noise are presented.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2000, Zeszyt Specjalny; 13-22
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: A Power Transformer as a Source of Noise
Autorzy:: Zawieska, W. M.
Powiązania:: https://bibliotekanauki.pl/articles/90466.pdf
Data publikacji:: 2007
Wydawca:: Centralny Instytut Ochrony Pracy
Tematy:: power transformer
noise reduction
active methods
transformer modeling
rectangular plate vibrations
transformer noise
vibroacoustic analysis
Opis:: This article presents selected results of analyses and simulations carried out as part of research performed at the Central Institute of Labor Protection – the National Research Institute (CIOP-PIB) in connection with the development of a system for active reduction of noise emitted by high power electricity transformers. This analysis covers the transformer as a source of noise as well as a mathematical description of the phenomenon of radiation of vibroacoustic energy through a transformer enclosure modeled as a vibrating rectangular plate. Also described is an acoustic model of the transformer in the form of an array of loudspeakers.
Źródło:: International Journal of Occupational Safety and Ergonomics; 2007, 13, 4; 381-389
1080-3548
Pojawia się w:: International Journal of Occupational Safety and Ergonomics
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja