Investigation of Wiper Blade Squeal Noise Reduction Measures

2001 ◽  
Author(s):  
Shinya Goto ◽  
Hiroshi Takahashi ◽  
Takio Oya
Keyword(s):  
Noise Reduction ◽  
Squeal Noise

scholarly journals Squeal Noise Reduction of an Automobile Wiper Blade

2014 ◽  
Vol 24 (5) ◽  
pp. 374-380 ◽  
Author(s):  
Jun-Gi Hong ◽  
Hong-In Won ◽  
Hyoung-Rae Kim ◽  
Min-Jae Yoon ◽  
Jintai Chung
Keyword(s):  
Noise Reduction ◽  
Squeal Noise

Application of a micro-perforated panel absorber to reduce the curve squeal noise of railways

2021 ◽  
Vol 69 (6) ◽  
pp. 507-517
Author(s):  
Woong-yong Lee ◽  
Jae-chul Kim ◽  
Hee-min Noh
Keyword(s):  
Noise Reduction ◽  
Noise Absorption ◽  
Measurement Results ◽  
Absorption Performance ◽  
The Difference ◽  
High Level ◽  
Curve Squeal ◽  
Squeal Noise ◽  
Curve Radius ◽  
Panel Absorber

A micro-perforated panel absorber (MPPA) can reduce noise without the use of sound-absorbing materials. It is made of various materials and is poten- tially applicable in a variety of fields. However, the application of MPPAs is limited owing to the narrow absorption band. In a previous study, to enhance the sound- absorption performance of MPPAs, we proposed a parallel arrangement of multi- layer MPPAs. Based on the results of this previous study, we carried out the present study to apply an MPPA to the curve squeal noise of railways. Squeal noise, which occurs at approximately 500 to 5000 Hz, has high-level peaks. We designed and fabricated an MPPAwith the proposed structure according to the characteris- tics of the squeal noise. The noise reduction was analyzed after an MPPA barrier was installed in the field with a curve radius of 120 m. The reduction in noise level was approximately 17 dB(A) on the first floor and approximately 7 dB(A) on the fourth floor of the building. At 630 to 5000 Hz, the noise reduction level was at least approximately 5 dB(A). To analyze the noise absorption effect of the MPPA bar- rier, a simulation was carried out and subsequently verified by comparing the measurement results with the simulation results. In the simulation, the difference in noise reduction level between the MPPA and reflective barrier was analyzed. The noise reduction level of the MPPA barrier was approximately 7.5 dB(A) higher than that of the reflective barrier on the second and third floors of the build- ing at 630 to 5000 Hz. These results support the viability of MPPA application in re- ducing noise from curve squeal noise.

scholarly journals Parametric Study for the Squeal Noise Reduction of an Automobile Water Pump

2013 ◽  
Vol 23 (7) ◽  
pp. 624-630
Author(s):  
Bohyeong Kim ◽  
W. Jung ◽  
H. Baek ◽  
D. Kang ◽  
Jintai Chung
Keyword(s):  
Noise Reduction ◽  
Parametric Study ◽  
Water Pump ◽  
Squeal Noise

Study on Parameter Optimization of Brake Pad for Squeal Noise Reduction for Urban Rail Vehicle Brake System

2019 ◽  
Vol 22 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Seoyeon Ahn ◽  
Chanhyuk Nam ◽  
Sungjin Choi ◽  
Daekwon An ◽  
Kyungsoo Seo ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Parameter Optimization ◽  
Brake System ◽  
Brake Pad ◽  
Rail Vehicle ◽  
Urban Rail ◽  
Squeal Noise
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