Noise monitoring · 4G stations

Warned before the complaint.

A station measures noise at your neighbour's home. If it goes above what was agreed, you get an SMS with the sound, and you act before they pick up the phone.

Station1 / 5

The terrace is full, the music is getting louder.Across the street, the station measures noise every second.

Analysis2 / 5

62 dB for 15 minutes, against 58 agreed.A single peak would not have triggered anything.

Analysis3 / 5

It is music, not traffic.The station recognises it live.

Alert4 / 5

The manager gets an SMS with a link to listen.No account, no app.

Alert5 / 5

The volume goes down. An SMS confirms it is quiet again.Nobody had to call anyone.

Illustration: a bar with its terrace and music, a street, and across it a residential building where a measuring station is fixed next to a window. Neighbour Station BAR PLACE NORD Operator BUILDING SITE Contractor FESTIVAL DES PRÉS Organiser USINE ZONE EST site boundary Operator SOUND LEVEL · 15 MIN 49.0 dB agreed 58 22:15 23:15 AI · MUSIC DETECTED
VIGIBRUITFRSMS
22:48Bar Place Nord: the music has been above the agreed level for 15 min (62 dB vs 58). Listen: vigibruit.fr/e/k3P9x
23:04Bar Place Nord: all quiet again, noise is back below the agreed level.
How it works

Three modules, three jobs

The station measures. Analysis decides whether there is a problem. The alert warns the right person.

Station

A measuring microphone, every second

A white case, the measuring microphone underneath, the 4G antenna inside. Every second, the station computes the sound level and its spectrum, recognises the type of noise, and records the sound when an alert goes out. Everything is sent continuously over the network.

Diagram of the station: a white cylindrical case made of stacked rings, fixed on a pole; the 4G antenna is inside; the measuring microphone, under its black windscreen, and the mains cable come out underneath. Mounton a pole or a façade Built-in 4G and GPSantenna inside the case Casemeasurement, sound recognition,battery, storage Measuring microphoneunder a windscreen Mains cable
Every second · simulation4G · sent
20 Hz31 bands20 kHz
TimedB(A)dB(C)dB(Z)
Station

Placed where the noise bothers people

At a neighbour's home, next to the most exposed window, to measure what they hear. Or on the site boundary, facing the houses, when the activity has to keep to a level at its fence. We install it, and the acoustician checks the measurement on site.

Diagram: on the left a noisy site behind its fence, in the middle a street, on the right a house. Position A: the station is fixed on the façade of the house, next to a window. Position B: the station is fixed on the site fence, facing the houses. Site B Street A Neighbour
  • A · At the neighbour'sBy the exposed window: nuisance is judged where it is heard.
  • B · On the site boundaryOn the fence, facing the houses, day and night.
  • No network needed4G transmission, time-stamped to the second, GPS position.
Station

Mains, sun, and even without power

The station runs on mains power, with a battery that takes over during a power cut. A solar panel is available as an option.

Pick a situation.

Plugged into a socket, the station keeps its battery charged.

Diagram: the station, its battery, a power socket and an optional solar panel. 100 % charging
  • Battery24 hours of autonomy without power.
  • After a power cutThe station restarts on its own.
  • Network downMeasurements stay on the station and are sent once the network is back.
Analysis

The right threshold, on the right indicator

A real day measured by one of our stations. Switch the indicator, move the threshold: the yellow areas are exceedances.

  1. Measure the site for a few days
  2. Choose the indicator: dB(A), dB(C) or a band
  3. Set the threshold and hours
  4. Adjust after the first alerts
24 h of real measurement · urban site · 24 Sept 2026
  • LAeq
  • LCeq
  • Background (L90)
Analysis

Bass: the noise that goes through walls

The same day, hour by hour, in 31 frequency bands. Move through the hours: in the afternoon, bass rises far more than the overall level.

Same station, same day · level per band, frequency in Hz
  • selected hour
  • night (03:00–04:00)
15:00–16:00
Overall level dB(A)
Bass 20–125 Hz
compared with the night (03:00–04:00)
Analysis

Knowing which noise it is

A bar's music, a building site's rock breaker, a festival's bass, a factory's extractor fan: the station does not just measure a level, it recognises live which noise it is. Nine types, each with its own setting: the alert only goes out for the right noise, for example construction AND above 65 dB, or technical equipment AND above 45 dB at night.

Click a category.

Diagram · 60 s analysed

Analysis

No alert for a single peak

The threshold does not apply to the noise of each second, but to its average over a chosen time, the Leq. A car door fades into it; a noise that lasts stands out.

One hour outside a site · 60 dB threshold · diagram
  • Instant noise
  • Average (Leq)
  • Alert
–SMS sent
–for nothing
–for the compressor
–before reporting it
  • Instant or averagedFrom one second to one hour.
  • Overall or per banddB(A), dB(C) or any of the 31 bands.
  • Combined conditionsUp to 8 AND / OR criteria.
  • Time slotsDay, night, weekend.
  • Alerts by type of noiseE.g. construction AND a level.
  • Minimum durationThe exceedance has to last.
Alert

Warn the right person

Who to warn, how, and when to say it is over.

  1. The alert

    A clear SMS: where, since when, how loud, and a link to listen.

  2. The reminder

    If it carries on, a reminder goes out at the chosen interval.

  3. The all-clear

    When it comes back down, a last message closes the episode.

VIGIBRUITFRSMS · example
14:32North Site: too much noise for 15 min, mostly bass (machinery, vibration). 62 dB vs 60 allowed. Listen: vigibruit.fr/e/k3P9x
15:02North Site: still too much noise, for 45 min now. Listen: vigibruit.fr/e/r7Tq2
15:21North Site: all quiet again, noise is back below the allowed level.
Alert

Listen before you act

The link in the SMS opens a page with no account or app: level, duration, type of noise, and the recording. In a few seconds you know whether it really is the site, and you act.

Press play.

Measured level62.4 dB (allowed: 60)
Bass (63 Hz)53.1 dB (allowed: 50)
Exceedance since14:17 (15 min)
Recognised noiseConstruction
0:14

Demonstration clip: rock breaker and site machinery.

Alert

Who gets warned, and when

Each contact has their own days and channel. The site manager on weekdays, on-call staff at weekends, the office by email: everyone only gets what concerns them. Everything is kept in the log and the PDF report.

ContactMTWTFSS
Site managerSMS
On callSMS
Officeemail
  • SMS
  • email
Use cases

For those who make noise without meaning to

You have a business to run and neighbours to keep on side.

Bars, venues, terraces

Nuisance is judged at the neighbour's home: the station goes across the street.

Analysis
Music recognised live, threshold set against street noise
Alerts
SMS to the manager during service

Building sites

Complaints mostly come from machinery and bass.

Analysis
Bass from 31 to 125 Hz, activity outside permitted hours
Alerts
SMS to the site manager, log for the project owner

Industry, quarries, shooting ranges

On the property line or at neighbours' homes, day and night.

Analysis
Day and night levels, impulsive noise
Alerts
Operator warned in real time, data for inspections

Local authorities and studies

Campaigns from a few days to several months, at one or more points.

Analysis
Several sites in parallel, acoustician's report
Alerts
Technical departments warned, exportable data
Comparison

What the station does, next to the others

Other systems are mostly designed for acousticians. Vigibruit is designed for the person who has to react.

What you need Vigibruit Class 1 monitoring stationse.g. 01dB CUBE and DUO, Svantek SV 307A Connected site monitorse.g. Sonitus EM2030, Noise Sentinel Urban sensorse.g. Cesva TA120
SMS and email alertsas soon as a threshold is exceeded
Included
Yes, through the manufacturer's platform
Yes
Depends on the city's platform
Listen to the sound from the SMSno account, no software
Listening link in every SMS
Played back in the software or platform
Played back on the platform
Recording not documented
Noise recognitionconstruction, music, equipment, voices, traffic…
9 types recognised live, log and PDF sorted by type
Detection filters, identification by listening
Depends on the model
Not documented
Alert by type of noisee.g. construction AND overall level
Included, set per station and per type, live detection
Not documented
Not documented
Not documented
Third-octave spectrum31 bands, from bass to treble
Included, every second
Depends on model and options
Optional
Not documented
Alert on a frequency bande.g. 63 Hz AND overall level
Up to 8 AND / OR conditions
Advanced triggers
Not documented
Not documented
Reminders and all-clearwhile it lasts, then the end
Included
Not documented
Not documented
Not documented
Recipients by dayweekdays, weekends, on call
Days and channel per contact
Not documented
Not documented
Not documented
Installation, thresholds and analysisby an acoustician
Included
Depends on the distributor
Depends on the distributor
Integrated by the local authority

Swipe the table sideways to see all columns.

Based on manufacturers' public documentation, consulted in October 2026: Svantek SV 307A, Sonitus EM2030, 01dB DUO, CUBE and WebMonitoring brochures, Cesva TA120 presentation. “Not documented” means the feature does not appear in that documentation. Brands mentioned belong to their owners. Spotted a mistake? Write to us and we will correct it.

Process

A complete service, not just hardware

  1. VisitWhere to measure, what causes the nuisance, who to warn.
  2. InstallationThe station is installed and the measurement checked.
    Station
  3. SettingsThresholds, hours, recipients and messages.
    Analysis Alerts
  4. Follow-upYou receive the alerts. We monitor the stations and an acoustician reviews the data.
Regulations (France)

Which criterion applies

The criterion depends on the source. The main cases in France, and what the station monitors for each.

SituationTextCriterion and role of the station
Activity noise heard by a neighbour (shop, bar, equipment, leisure) Public Health Code, art. R1336-6 to R1336-9 Overall emergence limited to 5 dB(A) by day (7 am – 10 pm) and 3 dB(A) at night, plus a correction depending on how long the noise lasts. Inside a dwelling, spectral emergence for equipment: 7 dB in the 125 and 250 Hz octaves, 5 dB from 500 Hz to 4 kHz. These criteria apply only when ambient noise exceeds 25 dB(A) indoors or 30 dB(A) outdoors. The station provides ambient and residual Leq, plus the required bands.
Construction site Public Health Code, art. R1336-10, prefectoral and municipal orders No emergence criterion. An offence is assessed on compliance with the conditions set (working hours in particular), the precautions taken and abnormally noisy behaviour. The station provides a time-stamped record of activity and alerts during prohibited hours.
Classified installation (ICPE) Order of 23 January 1997 Emergence in regulated zones: 6 / 4 dB(A) day / night when ambient is between 35 and 45 dB(A), 5 / 3 dB(A) above that. The property-line level is set by the prefectoral order, capped at 70 dB(A) by day and 60 dB(A) at night. The station monitors the site boundary continuously, day and night.
Venue playing amplified sound Public Health Code, art. R1336-1 to R1336-3, order of 17 April 2023 To protect the audience: 102 dB(A) and 118 dB(C) over 15 min. Above 300 people, levels must be recorded continuously and kept for 6 months. This in-venue measurement is the job of a limiter-recorder at the mixing desk, not of the station. Our role is on the neighbourhood side: impact at residents' homes, and the noise impact study (EINS) when required.
Specifications

The station at a glance

Measurement
  • LAeq, LCeq, LZeq every second
  • Leq, Lmax, L10, L50, L90… over any period
  • 48 kHz, 32-bit acquisition
Spectrum
  • 31 third-octave bands
  • 20 Hz to 20 kHz
  • Every second, can be grouped into octaves
Sound recognition
  • 9 types of noise recognised live on the station
  • Construction, amplified music, technical equipment, impacts, voices, barking, traffic, sirens, wind and rain
  • Alerts available on each type, set per station
Audio
  • MP3 recording with every alert
  • Scheduled long recordings
  • Listening through a secure link
Alerts
  • SMS (sender VIGIBRUITFR) and email
  • Reminders and all-clear
  • Recipients by day
  • Log and PDF report
Transmission
  • 4G, continuous upload
  • Time-stamped to the second, GPS
  • Measurements kept on the station during outages, sent once the network is back
Power
  • Mains charging
  • 24-hour battery
  • Optional solar panel
  • Automatic restart after a power cut
Data access
  • Live web interface
  • Historical dashboards
  • Data export
  • Email if a station stops responding
Contact

Request a quote

Tell us about your noise issue and we will get back to you to work out a solution.

monitoring@vigibruit.fr
+33 4 11 93 22 02
On-site service throughout France