The Association has completed various project work contents in obedience to the contract requirements for this year. Main results of our work are described as follows: 1. Noise management and maximum noise level control in the vicinity of airports The Project has completed case analysis for 12 airports of 8 countries based on traffic volume, airport characteristics, and locations to explore the noise management practices and measures, maximum noise level control standards, and monitoring methods adopted by various airports to address the aircraft noise issue in the vicinity of the airport. As a result, in terms of noise management, most airports adopt noise control measures on airport operations involving “departure, arrival, engine run-up, and curfew”. We have also completed work relating to the “Training Workshop on Review and Analysis of Aircraft Noise Monitoring Data and Their Interpretation Tools” with the support of the airport management and local Environment Protection Bureau where the airport is located. In terms maximum noise level control, we have completed collection of noise control practices adopted by airports of various countries, such as self-management measures, and preliminary proposal for the maximum aircraft noise control program. 2. Controlled acoustic ventilation windows on green or energy efficient buildings We have completed collection of information on related systems, principles and application techniques of various controlled acoustic ventilation windows (at least 10 types) and compared the progress of such type of acoustic ventilation windows over the past 5 years in 8 countries or regions. We have set up controlled acoustic ventilation windows at Taipei Municipal Nanhu High School, which have proved to be effective for low-frequency noise improvement and ventilation. Since the Project is based on the concept and ideas of innovation research promoted by the Environmental Protection Administration (EVA), primarily we selected schools on the side of the freeway to test the effectiveness of controlled acoustic ventilation windows in reducing noise. With the installation of ANC acoustic ventilation windows, the noise level reduced by 3 dB. Therefore, ANC acoustic ventilation windows have also proved to be effective for low-frequency noise improvement and ventilation. In view that ANC acoustic ventilation windows are still in the stage of research and have not been commercialized in the world, we suggest that further researches on the use of ANC acoustic ventilation windows, such as practical living application and applicable space size, be conducted in the hope of reducing the cost and actually using ANC acoustic ventilation windows to improve environmental noise in the future. 3. Implementation of the ultrasound detection camera system on motor vehicles We have completed implementation of the ultrasound detection camera system on motor vehicles and compilation of measurement data on environmental noise before and after improvement over the years along the ground transportation systems in our country. We have also compared and analyzed the noise measurements of various transportation systems to serve as reference for EVA in drawing up noise control strategies and management measures in the future. Furthermore, in obedience to EVA’s instruction, we have conducted 3 observation seminars and 2 public meetings on high noise detection photogrammetry system to exchange and share views with people from all walks of life. In the future, we suggest of exploring the relevance of noise measurements (standards) between moving and static vehicles and accurately setting up noise trigger levels based on the existing environmental conditions in order to effectively screen out, verify, and outlaw high noise vehicles so as to maintain a quiet living environment for the public.

Active Noise Control, Microphone Array