@article{oai:niigata-u.repo.nii.ac.jp:00003775, author = {渡部, 誠二 and 柳本, 憲作 and 谷藤, 克也 and 坂本, 秀一 and 高橋, 政行 and 一宮, 亮一}, issue = {701}, journal = {日本機械学会論文集. C編, 日本機械学会論文集. C編}, month = {Jan}, note = {The attenuation characteristics of a slit resonator that combined the adaptive feedback ANC system at a ventilation aperture of the package for leakage noise is investigated. The discrete tones radiated from an AC axial flow fan are controlled by DSP using Filtered-X Least Meane Square algorithm. The attenuation is found at the range of : 3 dB~14 dB with circular slit resonator, 2 dB~15 dB with elliptic slit resonator. Results of measurement show that the proposed system can achieve TNR (Tone to Noise Ratio) and PR (Prominence Ratio) under threshold effectively.}, pages = {327--334}, title = {適応フィードバック能動騒音制御による離散周波数音の抑制}, volume = {71}, year = {2005} }