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A study on the acoustic performance evaluation of heat recovery ventilator with a sound absorbing duct
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 Title & Authors
A study on the acoustic performance evaluation of heat recovery ventilator with a sound absorbing duct
Bae, Myung-Whan; Song, Jun-Young; Park, Hui-Seong;
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The purpose of this study is to investigate the acoustic problems of the conventional heat recovery ventilator and to suggest the methods of noise reduction from a heat recovery ventilator according to the installed location. The noise level, in this study, was measured and discussed as the parameters of size, wind volume and sound absorbing duct length for a heat recovery ventilator based on domestic and international related standards. It is found, as a result, that almost all of noise levels from the small and medium heat recovery ventilators without the sound absorbing duct in the anechoic chamber were higher than the noise standard value of 50 dB(A) regardless of the wind volume, and the noise levels went down when a sound absorbing duct was installed. In addition, the sound pressure level relative to frequency bands according to the length of sound absorbing duct was generally decreased, as the length of sound absorbing duct in the small and medium heat recovery ventilators was big, and the sound pressure level was generally increased, as the wind volume was great.
Heat recovery ventilator;Anechoic chamber;Sound absorbing duct;Noise level;Sound pressure level;Frequency bands;Wind volume;
 Cited by
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