Acoustic filters with a perforated tube
A method of calculating acoustic properties of a low-pass filter with a perforated side baffle separating two wave-guides with constant cross-section areas is proposed. It is based on the principle of segmentation of the wave-guide into a series of elementary models which describe properties of acou...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research Polish Academy of Sciences
2015-07-01
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| Series: | Archives of Acoustics |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/3091 |
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| Summary: | A method of calculating acoustic properties of a low-pass filter with a perforated side baffle separating two wave-guides with constant cross-section areas is proposed. It is based on the principle of segmentation of the wave-guide into a series of elementary models which describe properties of acoustic element related to individual rows of perforation and segments of acoustic wave-guides, and on the description of acoustic properties of these models with the application of a transmission matrix with its properties of a chain matrix. Also relationships are given from which acoustic properties of a perforated baffle can be determined for a discrete parameter model at a laminar flow through orifices of the perforation.
Moreover, a calculation model for determining generally applied measures – insertion loss and transmission loss – was proposed on the basis of the transmission matrix of an acoustic filter determined with the presented method. |
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| ISSN: | 0137-5075 2300-262X |