This paper describes theoretically the feedback effect of the secondary source on the primary source in a monopole system for active attenuation of noise in a duct, and gives a more accurate mathematical model Based on the model mentioned above, a new monopole system called the Analogue Compensating
On the study of the active attenuation of noise in an L-formed duct
โ Scribed by Jiluo Zhou; Tielin Shi; Shuqi Lu
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 527 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0003-682X
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## A BSTRA CT On the basis of interference theory relating to two spherical sound waves with opposite phase, a mathematical model of the active sound attenuation in free field is established. A t the same time, the attenuation and the attenuated sound field are modelled. The function of the monopo
It is well known that flanking sound transmission can affect the acoustic attenuation in ducts lined with dissipative material. The exact nature of the flanking paths, ''air-borne'' (sometimes termed ''radiation by-pass'') through ''breakout'' and subsequent ''breakin'' of sound through the duct wal