Actions to be taken before noise reduction implementations
Before the measures to be taken to prevent the noise problem emerging on the highways and railway network, noise maps regarding the noise levels and sources should be prepared. The most affected settlement areas and the number of schools, hospitals, residences at the settlement areas should be identified on these maps and their locations are determined.
Noise Action Plans, which identify the actions to be taken to reduce the noise levels or to fully prevent the noise based on the noise maps, are prepared. Hot spots, sensitive areas in other words, are identified in the Noise Action Plan using the population factor and excess value. Afterwards how much noise reduction is required at the regions with these hot spots (location and kilometer on the road network) is identified.
Determinations regarding production
In our country, there is no domestic manufacturer, whose products have the certificates that meet all EN standard frameworks. However, there are firms that manufacture at the European Union and distribute in Turkey. Acoustic tests within the scope of the aforementioned standards are carried out by the Turkish Standards Institute and partially by the National Metrology Institute.
Determinations regarding the legislation
Studies should be carried out on the requests regarding the legislation requests for the promotion of the certified products, which are domestic and have international validity, by being engaged in the necessary talks with the Ministry of Environment and Urbanization, General Directorate of Environmental Management.
Identifying the potential in our country and implementations to be carried out
The source inventories, which are necessary for the preparation of the noise maps of 59 provinces in Turkey, have been prepared and strategic noise map for 39 out of these have been completed by TUBITAK MAM. Noise maps of other 20 provinces will be completed until the end of 2019. Also, noise action plan studies for 6 provinces have started and source-based (highway, railway, industry, entertainment facilities) noise reduction scenarios have been developed within 3 provinces and feasible technical measures have been acoustically projected. Similar studies continue for other 3 provinces.
TUBITAK MAM started to carry out studies on developing barrier systems with the domestic materials, which comply with the international standards, together with the IMSAD members. Although concrete steps have not been taken yet, the foundations for collaboration with the firms that wish to carry out studies regarding this subject are being evaluated. Within this context, use of concrete, which is a long-lasting, durable, maintenance and repair free, solid and sustainable material, in the construction of noise barriers is being evaluated with care. The concrete stands out with the property of being poured according to different designs and workability and usability in a composite manner with different materials that are suitable in terms of engineering properties. The most competent project team to carry out the acoustic design and field works for the development of barrier systems in the country continue their works under the roof of TUBITAK MAM Environment and Cleaner Production Institute. The laboratory infrastructure is available at TUBITAK MAM ECP institute, which has accreditation certificates for product development regarding the identification of the acoustic conformity of the products of the manufacturer firms, also acoustic projecting of the products usable in the system and conducting the field performance tests.