Noise Level Compliance Logger
Log Leq day/night readings against residential ambient limits (55/45 dB) — exceedance flags, trends and reports for complaints and permits.
Monitoring points
Log a noise measurement
Field guide: Noise Level Compliance Logger
Noise disputes are lost for one reason: the evidence is an adjective. 'Unbearable' loses to a calibrated number with a date, time, location and method — which is exactly the record this logger builds. The limits encoded are the residential ambient standards (55 dB(A) day Leq, 45 night under India's CPCB rules; WHO guidance runs similar), with day and night logged as separate parameters because the night limit is both stricter and the one complaints actually turn on.
Leq — the energy-averaged level over the measurement period — is the legally meaningful number, not the instantaneous peak that phone apps love to screenshot; Lmax is captured separately for event documentation (the 3 a.m. compressor start). Zone matters: commercial and industrial areas carry higher limits (65/55 and 75/70 day/night respectively), so log your point's zone in the note. A week of same-time readings at the same GPS point is the difference between a grievance and a case.
Field tips
- Measure at the complainant's location (window, boundary), 1.2–1.5 m height, away from reflecting walls by a meter-plus — method survives cross-examination.
- Log a 'background' reading when the source is off/idle; the with-vs-without delta is often more persuasive than the absolute level.
- Phone SPL apps vary wildly (±5–10 dB); a cheap calibrated Class-2 meter turns the log from indicative into evidence.
Records are stored only in this browser (localStorage) — export regularly. This tool aids field documentation; it does not replace your agency's official inspection procedures or engineering judgment.
Noise Level Compliance Logger — Log Leq day/night readings against residential ambient limits (55/45 dB) — exceedance flags, trends and reports for complaints and permits. Free, offline-first and GPS-aware: open it on any phone, log in seconds, and hand your GIS team clean GeoJSON.
About Noise Level Compliance Logger
Noise disputes are lost for one reason: the evidence is an adjective. 'Unbearable' loses to a calibrated number with a date, time, location and method — which is exactly the record this logger builds. The limits encoded are the residential ambient standards (55 dB(A) day Leq, 45 night under India's CPCB rules; WHO guidance runs similar), with day and night logged as separate parameters because the night limit is both stricter and the one complaints actually turn on.
How to use Noise Level Compliance Logger
- 1Set up each monitoring site once with its location and GPS pin.
- 2Enter readings as you take them — limits for this medium are pre-configured from the cited standard.
- 3Exceedances are flagged instantly and the compliance rate updates as you log.
- 4Export the period's readings and exceedance report for your compliance file.
Why use Noise Level Compliance Logger?
- ✓100% free, no sign-up — built for crews, not per-seat licences
- ✓Offline-first: records save to your device instantly and survive dead zones
- ✓One-tap GPS tagging with accuracy capture on every record
- ✓Exports CSV for asset systems, GeoJSON for GIS, and print-ready reports
- ✓Checklist and guidance aligned with Noise Pollution (Regulation & Control) Rules, 2000 (India)
Frequently asked questions
What is Leq and why not just the loudest reading?+
Leq is the equivalent continuous level — the steady level carrying the same acoustic energy as the actual fluctuating noise over the period. Standards are written in Leq because annoyance and health effects track dose, not instants. A passing truck's 80 dB peak in an otherwise 40 dB hour barely moves Leq; a constant 55 dB hum dominates it.
What limits apply outside residential zones?+
Under CPCB ambient standards (day/night): industrial 75/70, commercial 65/55, residential 55/45, silence zones (hospitals, schools, courts — 100 m) 50/40 dB(A). The logger's built-in flags use residential values; for other zones, read your numbers against the matching pair and note the zone per site.
Are phone apps accurate enough?+
For trends and screening, decent apps on calibrated phones get within a few dB; for anything contested, no — microphones, cases and processing vary too much. The defensible chain: Class 2 (±2 dB) meter minimum, field-calibrated, with your logged method notes. Authorities measuring formally use Class 1.
How do construction noise rules differ?+
Construction typically gets permitted hours (e.g., 7am–7pm) plus equipment or boundary limits rather than ambient Leq alone — and night work needs specific permission almost everywhere. Daily Leq logs at the boundary, exactly what this tool produces, are the standard permit-compliance evidence.
Embed Noise Level Compliance Logger on your website
Want Noise Level Compliance Loggeron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
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