INCE/J has 15 Technical Subcommittees:
- 1. Sound Insulation
This subcommittee is working on various issues related to the sound insulation of
exterior noise for buildings, mainly apartment buildings, from a practical
viewpoint. We discuss the topics at the meetings which are held three to four times
This year, we will continue to study the method of measuring the noise insulation performance of perimeter walls using impulse response under large backgroud noise. In addition, we will continue to collect information on aircraft noise issues that may increase with the operation of the new flight path to Haneda Airport.
- 2. Floor Impact Sound
- This subcommittee is working by establishing a non-RC construction WG and an interior material WG. The non-RC construction WG collects floor impact sound data and building information for timber and steel structures. In addition, the frequency characteristics of walking sounds of timber floors and RC floors are also compared. The Interior Material WG is investigating the effects of interior materials from among the papers on floor impact sound, and is examining the effects of measurement room characteristics, such as ceiling material, wall material, and room shape, on floor impact sound insulation performance.
- 3. Noise & Vibration Policies
- 4. Outdoor Sound Propagation
- 5. Low Frequency Sound
The low-frequency sound subcommittee, which was established in 1984, has a long
history among the INCE/J subcommittees and is composed of 41 members.
The fields of activity are as follows.
1 : Research and development of low-frequency sound generation mechanism from various devices, equipment, transportation, etc. and its reduction technology.
2 : Research and development of low-frequency sound measurement method.
3 : Research and development of low-frequency sound propagation prediction Technical Subcommittee method.
4 : Research on the effects of low-frequency sounds and their evaluation method.
5 : Research on complaints from low-frequency sounds.
6 : Development of new technology using low-frequency sound.
The low-frequency sound subcommittee holds subcommittee meetings two to three times a year to report on the research activities of each member, exchange opinions on them, and exchange various information on low-frequency sounds. Occasionally, we also visit research facilities related to low-frequency sound.
- 6. Active Control
- The active control subcommittee aims to promote the dissemination and development of active control technology in Japan through reports of the latest cases, technical discussions, and facility tours by the committee members.
- 7. Sonic Environment Design
- Subcommittee on Sonic Environment Design discusses how our sonic environment should be, and depicts load maps to make better sonic environments.
- 8. Machinery Noise Measurement
- 9. Environmental Vibration Evaluation
- The Environmental Vibration Evaluation Subcommittee members are composed of researchers and engineers from universities, governments, and companies. We are working to share and organize the latest information on environmental vibration evaluation, exchange opinions based on it, and promote joint research among committee members.
- 10. Road Traffic Vibration Estimation
- 11. Socio-Acoustic Survey Data Archive
- A number of socio-acoustic surveys on community responses to noise have been conducted in Japan. They obtained micro-data consisting of noise exposure data and reactions to noise by respondents. While dose-response relationships determined from the results of such socio-acoustic surveys can form the basis for effective noise policy, micro-data has yet to be accumulated into a unified system. Thus, the Japanese Government faces many difficulties in reviewing noise policy and creating effective measures. The Institute of Noise Control Engineering/Japan (INCE/J) established subtechnical subcommittee called the Socio-Acoustic Survey Data Archive in 2009 for the purpose of developing an archive of community responses to noise. By summarizing all relevant results that have been published in this field, we have actively managed the Japanese Socio-Acoustic Survey Data Archive (J-SASDA) since 2011. Additionally, we intend to establish the Asian Socio-Acoustic Survey Data Archive (A-SASDA) in the near future in collaboration with researchers from neighboring Asian countries, including South Korea, China, Hong-Kong, Vietnam, and Thailand. Community responses to noise vary among countries. We believe that Asian countries will find our data archives both useful and necessary when reviewing and developing their own new noise policies. This home page is designed specifically for the A-SASDA, and as such we encourage Asian researchers to join our network for the purpose of improving their future global noise policies. A centralized data archive is important because it contributes to the development of future noise studies. Moreover, the data are maintained in a format that facilitates their secondary use, such that the data can be retrieved anytime in the future when additional analysis may be deemed necessary. We hope that many researchers will understand our purpose in developing this data archive and website and be willing to collaborate with us. If you are interested in using or depositing data into the archive, please contact us. We look forward to talking with you in greater detail.
- 12. Investigation of High Frequency Sounds
- 13. Mysterious Sound
- 14. Noise Map
- 15. Aerodynamic Noise
- In wind and air flow, sources of noise are often aerodynamic sound generated from the unsteady flow. It is well known that aerodynamic noise is radiated with transportations such as trains, automobiles and aircraft, also with medical equipment, cooling system for information equipment and home appliances, air conditioning systems, ventilation systems, balcony fences for high-rise houses, handrails for bridges, and more buildings. Therefore, research and development of noise reduction or countermeasures are required. This subcommittee was established in October 2016, and its activity policy is “We elucidate and spread the technical methods that enable engineers who cannot use large-scale experimental facilities or high-performance super computers to accurately implement measures to reduce aerodynamic noise”. The committee will meet three times a year in order to exchange information for sharing and disseminating highly specialized technologies related to aerodynamic noise (elucidation of generation mechanism, wind tunnel experiments, computational fluid dynamics analysis, visualization of flow and sound, etc.). We also conduct a technical tour of related research facilities. In addition, we plan and manage the organized session at research recitals, and if possible, intend to hold seminars on aerodynamic noise reduction cases and publish a DVD of reduction case studies.