Can be seen that in the case of the installation of the sound barrier type Steel 24 ga which is effective in reducing the minimum sound volume is likely to be in school in the normal criteria that Laos accepted sapop.
It can be seen that in the case of installing sound-proof walls of Steel 24 ga, a powerful type of noise is minimal to reduce noise levels in schools in the rules which the Lao PDR., Agree. have
It can be seen that, in the case of installation of sound barrier type Steel 24 GA type which are effective in reducing the minimum should reduce the volume in the school in the normal rules. PDR accepted.