1.
図書 |
渡部誠二
|
|||||||
2.
論文(リポジトリ) |
渡部, 誠二
|
|||||||
3.
論文(リポジトリ) |
渡部, 誠二 ; 柳本, 憲作 ; 谷藤, 克也 ; 坂本, 秀一 ; 高橋, 政行 ; 一宮, 亮一
概要:
The attenuation characteristics of a slit resonator that combined the adaptive feedback ANC system at a ventilation aper
…
ture 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.
続きを見る
|
|||||||
4.
論文(リポジトリ) |
坂本, 秀一 ; 高井, 光太郎 ; 深井, 雄史 ; 柳本, 憲作 ; 渡部, 誠二 ; 一宮, 亮一
概要:
This paper deals with the development of a new method for measurement of the height for granular material in a cylinder. For monitoring of automated filling processes of cartridges in a series production a new measurement method was
…
developed which allows to detect rapidly incorrect products and to improve the process capability by the use of this method. The aim of this research work is to measure the level of granular material in a cartridge without contacting the material. The material is the mixture of the solid particles and air. The material is assumed as the porous media from the viewpoint of acoustics. As that, the inside of the cartridge, which is filled with granular material, is the acoustic system including porous media. The measuring method used the relationship between amount of granular meterial in the cartridge and the characteristics of the transfer function of the acoustic system is developed. The acoustic characteristic of the granular material, which is used for the theoretical analysis was also measured.
続きを見る
|
|||||||
5.
論文(リポジトリ) |
坂本, 秀一 ; 高畠, 昌志 ; 柳本, 憲作 ; 渡部, 誠二 ; 一宮, 亮一
|
|||||||
6.
論文(リポジトリ) |
渡部, 誠二 ; 柳本, 憲作 ; 谷藤, 克也 ; 坂本, 秀一 ; 伊藤, 孝宏 ; 一宮, 亮一
概要:
This paper describes insulation characteristics of slit resonator that a single channel ANC system for silencing leakage noise at ventilation aperture of package. The circular slit resonator composed of thin air layer that is radial
…
expansion with very short axial length was set up package wall. The circular thin air layer is driven by one to four speakers that are controlled using Filtered-X-LMS algorithm to minimize sound power at error microphone. The experimental results show that the noise reduction region spreads to the high frequency side, as the slit depth decreases. The noise reduction quantity increases, as the slit width widens. Visualization of SPL and phase on the circular slit resonator indicate that the noise reduction mechanism is the interference of control sound and noise.
続きを見る
|
|||||||
7.
学位論文(リポジトリ) |
渡部, 誠二
概要:
新潟大学<br />平成18年3月23日<br />新大院博(工)第215号<br />新大院博(工)甲第215号
|