Based on the provided reference from La Salle University, the sound pressure level of a jet engine is measured to be between 110 and 140 dB when heard at a distance of 100 meters.
This range indicates that a jet engine is an extremely loud source of sound. To provide context, the reference also includes other common sounds and the threshold for potential hearing damage:
| Source of sound | Sound pressure level (dB) |
|---|---|
| Jet engine at 100 m | 110 - 140 dB |
| Jack hammer at 1 m | approx. 100 dB |
| Traffic on a busy roadway at 10 m | 80 - 90 dB |
| Hearing damage (over long-term exposure) | 85 dB |
As shown in the table, the noise level from a jet engine at 100 meters is significantly higher than the level at which long-term exposure can cause hearing damage (85 dB). This highlights the need for hearing protection when near operating jet engines.
