A Bangkok roadside-noise reading covers one place and time. Check where, when and how it was measured before you judge a hotel, a school or a street.
Start with three things: where the reading came from, when it was taken, and how. A monitoring station, a complaint, and a noise model are different kinds of evidence. Road noise, aircraft noise, and workplace noise are usually measured differently too. Check the source first. Then use the result to judge a room or a street.
Thailand's Pollution Control Department runs this official noise-monitoring site. Each station has a code, an area type, and a last-update time. Stations also show sound levels: the average over 24 hours, the average for one hour, and the lowest and highest levels seen. Daily figures are marked as early, not final.
Access: A public dashboard and station pages. No bulk API is confirmed. Updates: Live snapshots. Some stations add hourly and daily detail too.
Past daily noise readings from Pollution Control Department stations across the country. These are usually published once a year, as files you can download.
Access: A government data listing with file downloads. Updates: Daily to yearly, depending on when each file comes out.
Map data that marks noise-monitoring stations on OpenStreetMap. Use it to find public or private monitoring points near a place you care about.
Access: OpenStreetMap's Overpass tool, under an open map-data licence. Updates: Edited by volunteers, so it can change at any time.
Check the place, date, and coverage before using the information for a current plan.