Cars running on Expressway line one. Sound, sound intensity level of 90 decibels at a distance of 20 m from the road if residing in this area, there will be a solution to how the sound intensity decreases to 80 decibels.
Cars that run on one expressway. Sounding the level of intensity noise 90 decibels at a distance of 20 meters, a residential street in this area. Is there a way to fix the sound intensity level was reduced to 80 decibels.
The cars run on the express line. Sound with the sound intensity level 90 dB at a distance from the road 20 meters. If living in this area. How do make sound intensity level is lowered, 80 decibels.