TY  - JOUR
PY  - 2008//
TI  - Active control of feedback noise from a small step on the surface of rear-view mirror
JO  - Transactions of Society of Automotive Engineers of Japan
A1  - Iida, Akiyoshi
A1  - Honda, Taku
A1  - Oguma, Nobuyoshi
A1  - Kato, Chisachi
A1  - Mizuno, Akisato
SP  - 3_29
EP  - 3_34
VL  - 39
IS  - 3
N2  - To reduce the aerodynamic tonal-noise from rearview mirrors, active flow control techniques were utilized with oscillating jets on the surface of rear-view mirror. The experimental results showed the noise reduction level depended on the frequency and intensity of the oscillating jets. The noise reduction level was 20 dB at the oscillation frequency about 400Hz and the jet velocity about 0.1 m/s. Both of the frequency and intensity of the jet were smaller than the frequency of the feedback noise and the uniform flow velocity. These results indicated that the oscillating jets effectively reduced aerodynamic noise with small amount of energy.<p />  <p>Language: ja</p>
LA  - ja
SN  - 0287-8321
UR  - http://dx.doi.org/10.11351/jsaeronbun.39.3_29
ID  - ref1
ER  -