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- W2024156680 abstract "The aim of this work was the design and implementation of a hybrid passive/active system to control the noise radiated by a small generator. The fundamental frequency of the periodic radiated noise depends on the electrical load plugged into the generator. Passive control is afforded by a rectangular enclosure with dimensions 1000×710×530 mm3. The wall panels of the enclosure (steel 1.5 mm thick) are lined with a 30-mm layer of sound absorbing material. Special attention is paid to technical aspects such as air refreshing and temperature inside the enclosure. The measured insertion loss is higher than 20 dB above 500 Hz. Low-frequency noise escapes the enclosure via intake and exhaust openings. Active control is applied to the exhaust noise. The reference signal is supplied by an accelerometer over the air filter case of the generator. A high-temperature loudspeaker is used as control source. The error signal is picked up by a cheap electric microphone. Since noise along the exhaust is too loud, the microphone sensitivity had to be reduced by taping its diaphragm. A commercial system is used to implement active noise control. [Work supported by CICYT, Project AMB97-1175-C03-01.]" @default.
- W2024156680 created "2016-06-24" @default.
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- W2024156680 date "1999-02-01" @default.
- W2024156680 modified "2023-09-24" @default.
- W2024156680 title "A hybrid passive/active system for control of the noise radiated by a small generator" @default.
- W2024156680 doi "https://doi.org/10.1121/1.425498" @default.
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