| Item type |
会議発表論文 / Conference Paper(1) |
| 公開日 |
2010-12-14 |
| タイトル |
|
|
タイトル |
[N380] A one-dimensional wave model for numerical analyses of ventilation openings with Helmholtz resonator attachments |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_5794 |
|
資源タイプ |
conference paper |
| 著者 |
寺尾, 道仁
Terao, Michihito
関根, 秀久
Sekine, Hidehisa
小川, 雄史
Ogawa, Yushi
坂下, 聡康
Sakashita, Akiyasu
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
A ventilation opening becomes a primary sound transmission path for a room when the room employs double glazing windows for sound insulation. Especially it is difficult to suppress the noise component that coincides with the lowest resonance frequency of the longitudinal modes of the opening. For this mode, Helmholtz resonator attachments can be effective while mufflers made of sound· absorbing materials work only a little. However in designing a Helmholtz resonator attachment to a ventilation opening, a series of trial and error simulations are indispensable because resonators have reactive nature. Numerical analyses based on one-dimensional wave models are preferable for the repetitious optimal design stage. However, for a resonator array of very short longitudinal intervals of a few centimeters, effectiveness of one-dimensional wave models has not been confrrmed so far. Several prototypes of Helmholtz resonator attachments were investigated here. Their performances were determined by conducting experimental tests, numerical simulations by a one-dimensional plane wave model and those by a three-dimensional BEM. Consequently, for an transmission loss curve (for 100 discrete frequencies) of an opening of less than a half meter long, the numerical analysis by the three-dimensional BEM took a week while that by the one-dimensional plane wave model performed instantaneously. Nevertheless the results by the one-dimensional wave model agree excellently with
those by the three-dimensional BEM, and agree fairly well with those by the experiments. |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
会議名称:The 33rd International Congress and Exposition on Noise Control Engineering |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
主催学会:CAS |
| 書誌情報 |
Proceedings. INTER-NOISE 2004 :August 22-25 2004. Prague Czech Republic.
p. 1-6,
発行日 2004
|
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
|
|
出版者 |
CAS |
| 資源タイプ |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Article |
20 inter･noise200408.pdf (542.0 kB)
