Noise Measurement | Noise Management by Experts

Hints and Tips for Accurate Noise Measurement

Accurate noise measurement is critical for ensuring compliance with noise-induced hearing loss regulations and protecting the well-being of employees exposed to high noise levels. Proper noise management helps identify hazardous noise zones and plays a vital role in implementing effective control measures.

In this article, the occupational health and safety experts at IOH Solutions offer a few practical tips on how to monitor noise levels. We also investigate factors like positioning the noise meter, understanding decibel levels, and how to account for factors affecting measurement accuracy.

How Noise Measurement Can Be Done Accurately

When measuring noise levels in your workplace, consider the following factors:

Positioning the Noise Meter

1. Strategic Placement: Position the noise meter at locations where employees are most likely to be exposed to high noise levels. This often includes near noisy machinery or equipment, and in areas where employees spend significant amounts of time. Ensure the meter is at ear level to accurately reflect the noise the workers are exposed to.

2. Avoid Obstructions: Place the meter away from any obstructions such as walls, machinery, or other structures that could reflect or absorb sound. These obstructions can distort the measurement, leading to inaccurate results.

3. Distance and Direction: Keep the meter at a reasonable distance from the noise source to avoid direct exposure which might overload the meter. It should be oriented in the direction of the primary noise source to capture the most relevant sound levels.

4. Height and Stability: Ensure the meter is placed on a stable surface or mounted securely to avoid any movement during measurement. The height of the meter should be consistent with the hearing height of the workers, typically around 2 to 1.5 meters from the floor.

Understanding Decibel Levels

To accurately measure noise levels, one needs to understand the decibel factor. Here is a basic guide to consider:

1. Decibel Scale: Noise levels are measured in decibels (dB), and it is important to understand the scale. The decibel scale is logarithmic, meaning that an increase of 10dB represents a tenfold increase in the sound intensity. For example, a noise level of 85dB is ten times more intense than 75dB.

2. Noise Rating Limits: According to regulations, noise exposure exceeding 85dB over an eight-hour shift requires action. This threshold is used to define the need for noise control measures. Regularly calibrate your noise meter to ensure accurate readings and compliance with regulatory requirements.

3. Measurement Duration: Continuous or repeated measurements are critical for a comprehensive assessment. Short-term measurements might not capture fluctuations in noise levels or provide a full picture of exposure over time.

Factors Affecting Measurement Accuracy

Consider the following factors to ensure accurate noise measurement:

1. Environmental Conditions: Temperature, humidity, and atmospheric pressure
2. Interference: External noises like wind, traffic, and passing public transportation
3. Meter Calibration: Regular calibration of the noise meter is essential.

Call on IOH Solutions: Specialists in Occupational Safety

IOH Solutions has been the leader in occupational health and safety since 2003. We are accredited by the South African National Accreditation System (SANAS) and registered with the Department of Labour (DoL) as an Approved Inspection Authority (AIA).

We specialise in various aspects of workplace safety, including noise measurement. Our expertise extends to identifying, evaluating and controlling various workplace hazards, ensuring comprehensive compliance and protection for companies and employees. If you need assistance with brushing up on your workplace safety procedures, contact us for an obligation-free consultation.