Noise Level Monitoring

Noise or sound level monitoring or measurement is a process to measure magnitude of Noise in industries and residential area. Data collected from Noise level monitoring helps us to understand trends and action can be taken to reduce noise pollution. Noise pollution is Low or High frequency sound that can cause/harm the activity of human life. It can be caused by various industrial Machines, Motor Vehicles and Craft etc. This process is a part of Environmental Monitoring as noise pollution is also increasing exponentially in recent years.

Measurement of Noise level

Noise pollution is measured by Sound/Noise level meter. It consists of several pNoise Level Monitoringarts, mainly Microphone, Pre-amplifier, frequency weighting, Processor, Display System, communication System and Power Supply. dB(A) Leq denotes the time weighted average of the level of sound in decibel on scale A which is relatable to human hearing.

A “decibel” is a unit in which noise is measured. “A”, in dB (A) Leq, denotes the frequency weighting in the measurement of noise and corresponds to frequency response characteristics of the human ear.

Leq: It is an energy mean of the noise level over a specified period.

Noise level Survey schedule is planned in such a way that it covers the noise generation by normal daytime activities i.e. from 08:00 am to 10:00 pm and a part of nighttime activities i.e. 10:00 pm to 12:00 am (at night).

Due to increase in noise pollution in recent years, it is recommended to conduct measurement of noise pollution program in company premises.

Noise level Monitoring

The answer of the question of how to measure sound lies in Noise level Monitoring or sound Measurement for particular instance or for 24X7 hrs to analyze trends for better understanding of environment. these Processes also used in Noise Impact Assessment (We love to do this 😉 ) by Noise level Testing companies. This process is also called as Noise level Measurement.

To know more about Noise impact assessment.


Noise produced by industries is called Industrial Noise. In general it is produced, at every stage in industry by various aspects like welding, hammering, drilling, blowing, running machinery, motors, sheet metal work, lathe machine work, operation of cranes, grinding, turning, fabricating, forging, compressing, breaking, molding, steaming, boiling, cooling, heating, venting, painting, pumping, packing, transporting etc. It creates very serious of large-scale noise problems; significantly affect the working people as well as surrounding people.Industrial noise


i)Road Traffic Noise:

Road traffic is the most widespread source of noise. It is directly proportional to the volume of vehicles. Increasing of population is increasing of vehicles and hence increasing of Noise pollution. The major sources of noise in automobiles are exhaust, intake, engine and fan, and tires at high-speed. Noise measurement or sound measurement can be done by noise level monitor instrument (or with noise level data logger).

Traffic Noise Pollution

ii) Residential Noise

In normal day –to – day activities, various home appliances in our residences produce noise. Some of the major sources are Exhaust Fans, lawn movers, grinders, Fan, Cooling & Heating System, T.V & Music System, motors used for pumping etc.

Read here how to reduce noise pollution

Noise Level Standards

Limits or noise level standards defined by pollution control board during Day time for Residential Noise < 55 dB and Limits during Night time for Residential Noise < 45 dB
In industry, there are of two types Sound Monitoring or Noise Level Measurement:

  • Ambient Noise level Monitoring
  • In-plant Noise level Monitoring

A) Ambient Noise level standards

Ambient Noise level Monitoring or Noise pollution Measurement within industrial zone at ambient conditions. (e.g. Near Main Gate, Near Canteen, Near Manufacturing plant etc.) As per Central Pollution control Board (as per Factory act 1948):
Limits or acceptable noise level during Day time for Ambient Noise < 75 dB and Limits during Night time for Ambient Noise < 70 dB.

B) In-plant Noise level Standards

In-plant Noise level means Sound level measurement allocated in the plant.As per Central Pollution control Board (as per Factory act 1948) Limits for In-plant Noise level < 90 dB.

Learn more about Workplace or Office Environment Monitoring for employee health and safety

Noise Level Testing Company

Perfect Pollucon Services is a leading Noise Level Testing Company in India. We have highly trained and highly experienced professionals who can take care of Noise level Monitoring or testing.

Noise Monitoring / Testing Services

We offer Noise monitoring services to measurement noise pollution for D.G. stacks, traffic, machines etc. Our professionals use technically advanced monitoring and analysis tools. We offer Noise Quality monitoring services as per national standards and regulations backed up by timely execution, efficient professionals and cost effectiveness.

We offer Noise testing services in customized options for 24 hours and multiple sites as per demands of our clients, environmental agencies, furnace units, chemical plants and conveying units.

Our Special Features:

  • Cost competitiveness
  • Eco friendly
  • Time adherence
  • Legal compliance

We carry out Noise Monitoring And Noise Testing services with periodically calibrated instruments which gives you accurate reading with analysis report.

Please contact us for more information or avail our Environmental Monitoring services.

Perfect Pollucon Services