For continuous noise exposure between 65-75 dB in a solar plant's SCADA/UPS room, implement noise control measures like acoustic insulation, sound-absorbing materials, and regular equipment maintenance

 For continuous noise exposure between 65-75 dB in a solar plant's SCADA/UPS room, implement noise control measures like acoustic insulation, sound-absorbing materials, and regular equipment maintenance. Conduct a noise frequency analysis and consider if the noise level necessitates hearing protection based on regulatory limits, which in Indian industrial zones are 75 dB during the day and 70 dB at night according to VayomTech. Prioritize protecting workers' hearing to prevent noise-induced hearing loss by providing appropriate personal protective equipment (PPE) and ensuring safe working conditions.

 

Understanding the Risk 

Continuous exposure:

A constant noise level of 65-75 dB in a working environment can lead to hearing damage over time.

Noise-induced hearing loss (NIHL):

This is a serious, permanent condition that is 100% preventable through proper noise management.

Logarithmic scale:

The decibel (dB) scale is logarithmic, meaning that loudness increases rapidly. A 10 dB increase is perceived as twice as loud.

Safety Precautions

Noise measurement:

Perform a detailed frequency analysis of the noise to understand its characteristics. 

Source control:

Equipment Maintenance: Regularly inspect and maintain equipment (SCADA, UPS) to reduce operational noise. 

Dampening: Use vibration-damping materials on equipment and structures to absorb sound. 

Room treatment:

Acoustic Insulation: Install acoustic panels and insulation in the room to block or absorb sound, especially if there are adjacent spaces. 

Sound-Absorbing Materials: Use ceiling and wall panels that are designed to absorb sound, reducing reverberation. 

Hearing Protection (PPE):

Risk Assessment: Determine if the noise levels in the room exceed permissible limits based on local regulations, which is crucial for deciding when PPE is required. 

Mandatory Use: Provide and mandate the use of appropriate hearing protection (earplugs, earmuffs). 

Regular Monitoring:

Continuously monitor noise levels and worker exposure to ensure ongoing compliance and safety. 

Regulatory Considerations

Industrial Zones:

In India, the maximum permissible noise level in industrial zones is 75 dB during the day. 

Worker Protection:

While 75 dB is the upper limit, prolonged exposure to sounds above 70 dB can still damage hearing. Therefore, proactive measures are essential.