Gunshot Hearing Exposure Calculator
Enter the measured gunshot dB SPL number from the firearm and suppressor setup you want to evaluate. Do not enter suppressor dB reduction; that is a different number. This calculator estimates a conservative effective peak at the ear and allowable rounds per day.
Suppression education, engineering, and real-world sound testing.
Input
This should be the gunshot’s measured peak dB SPL, not the suppressor’s dB reduction.
Outputs
Dose chart
What the outputs mean
Gunshot dB SPL is the measured sound level from the firearm setup. Use the gunshot number, NOT the suppressor’s reduction rating.
Effective peak at ear is the input level after protection attenuation and impulse penalty adjustments. This is the value used to estimate exposure risk.
Allowable rounds/day is a conservative estimate of how many rounds fit under the selected daily impulse ceiling using a 3 dB exchange rule.
Disclaimer / Assumptions
Important assumptions
- This calculator assumes the hearing protection attenuation entered by the user is fully effective in real-world use. In practice, fit, seal, glasses, movement, and other factors can reduce protection versus the label.
- Real-world Noise Reduction Ratings (NRR) are often lower than the printed value. Many users should treat the selected protection as an estimate, not a guarantee.
- This calculator does not model bone conduction. At very high impulse levels, sound can still reach the inner ear through the skull and jaw even when the ear canal is protected.
- This calculator does not distinguish between indoor and outdoor shooting environments. Indoor ranges can add reflections and reverberation that increase exposure and perceived loudness.
- This tool is for educational use only and is not a medical, legal, or occupational hearing-conservation determination.