Table of Contents
How far can you hear 140 dB?
The jet plane, 140dB at 50m, would be 170dB at 1m-ish, working the math the opposite direction. The plane is audible outdoors (70dB) out to roughly 50km (again, off by a doubling or two). You can easily hear a passing jetliner at 30-50k feet plus some horizontal distance (10-20km).
How far can you hear 30 decibels?
20 dB: Whispering from five feet away. 30 dB: Whispering nearby. 40 dB: Quiet library sounds. 50 dB: Refrigerator.
What does 85 dB sound like?
Common Sources of Noise and Decibel Levels
| Everyday Sounds and Noises | Average Sound Level (measured in decibels) |
|---|---|
| Normal conversation, air conditioner | 60 |
| Washing machine, dishwasher | 70 |
| City traffic (inside the car) | 80–85 |
| Gas-powered lawnmowers and leaf blowers | 80-85 |
How loud is 55dba?
Example of decibels
| DECIBEL | SOUND | EXAMPLE |
|---|---|---|
| 50 | Limited sound | Refrigerator working, car driving past |
| 55 | Percolating coffee-maker | |
| 60 | Audible | Sound of human voice, machinery |
| 70 | Irritating | Television set on loud, vacuum cleaner, several people on the telephone |
How loud is a yell?
Using everyday items you could probably measure sounds in the range of roughly 20 to 80 dB. Human screams can be quite loud, possibly exceeding 100 dB (as of March 2019, the world record is 129 dB!) —but you probably want to avoid that because screams that loud can hurt your ears!
How far can 60 dB be heard?
Distance and perception of voice.
| Distance | Voice Level (dB PSIL) | |
|---|---|---|
| (ft) | (m) | Very Loud |
| 6 | 1.8 | 66 |
| 12 | 3.7 | 60 |
| 24 | 7.3 | 54 |
What’s the danger of hearing a 100 dB sound?
Dangerous Range (85 to 115 dB) Sounds at this range can damage your hearing, either immediately or through prolonged exposure. Without ear protection, nobody should be exposed to 90 dB for more than 8 hours per day, 100 dB for 2 hours, 105 dB for 1 hour, or 110 dB for more than half an hour. Serious Injury Range (115 dB to 140 dB)
How many dB can you hear in an hour?
Sounds at this range can damage your hearing, either immediately or through prolonged exposure. Without ear protection, nobody should be exposed to 90 dB for more than 8 hours per day, 100 dB for 2 hours, 105 dB for 1 hour, or 110 dB for more than half an hour. Serious Injury Range (115 dB to 140 dB)
How many times as loud as 70 dB?
8 times as loud as 70 dB. Serious damage possible in 8 hr exposure. Boeing 737 or DC-9 aircraft at one nautical mile (6080 ft) before landing (97 dB); power mower (96 dB); motorcycle at 25 ft (90 dB).
Is there a limit to the decibel range?
Decibel Equivalent Tables Inaudible Range (Less than 10 dB) Since it’s logarithmic and relative, the decibel scale is also limitless in both directions and doesn’t stop at 0. Zero dB is theoretically the lowest limit of human perception, but in practice, a human will rarely be able to hear a sound below 10 dB.