SNR stands for Single Number Rating (also referred to as Simplified Noise Level Reduction). It is a simplified method used to determine the amount of noise reduction provided by a hearing protection device, such as ear defenders.
The SNR value is a single figure measured in decibels (dB) that indicates how much the hearing protection reduces the level of noise entering the ear. This figure is used to help estimate the noise level that a wearer will be exposed to when using the ear protection correctly.
To calculate the estimated sound pressure level at the ear, subtract the SNR value from the overall measured noise level in the environment.
Example: If the measured noise level in the environment is 100 dB and the ear defender has an SNR of 30, the effective noise level at the ear would be approximately: 100 dB - 30 dB = 70 dB
This calculation provides a general idea of the effectiveness of the hearing protection. However, it is important to remember that this is a simplified method and may not account for all variables such as frequency distribution of noise or fit of the product. For more accurate assessment, the HML method (High, Medium, Low frequency attenuation) may be used, which considers noise frequency more closely.
Key points:
- SNR stands for Single Number Rating.
- It is used to show how much noise ear defenders reduce in decibels.
- To use it, subtract the SNR from the overall noise level.
- The result estimates the sound pressure level reaching the ear.
- It is a simplified method and may not reflect complex noise environments.
If you need further support, please contact our Technical Support Team using the email: technical@jspsafety.com or contact us via our WhatsApp.