Sight and Audio Ranges
How far can a person see and hear?
| Sight Ranges | ||||
| Presented here is a table with the maximum distance a person can see clearly. It is divided into how far away a person can see a jumbo jet, a car, a man and finally full details on an object. All ranges are in metres unless specified otherwise. | ||||
| Conditions | Jumbo | Car | Man | Detail |
| Clear day | 48kms | 2700 | 1350 | 18 |
| Cloudy or overcast | 32kms | 2160 | 1080 | 18 |
| Mist or light rain | 24kms | 1800 | 900 | 9 |
| Light fog, snow or heavy rain | 12kms | 450 | 450 | 9 |
| Moderate fog, snow or torrential rain | 4.8kms | 225 | 90 | 9 |
| Dense fog or blizzard | 180 | 45 | 9 | 2.7 |
| Twilight | 16kms | 900 | 450 | 9 |
| Clear night with full moon | 24kms | 800 | 90 | 4.5 |
| Clear night with half moon | 16kms | 720 | 67.5 | 4.5 |
| Clear night with stars | 8kms | 540 | 45 | 2.7 |
| Overcast night with full moon | 3.2kms | 450 | 31.5 | 2.7 |
| Overcast night with half moon | 1.6kms | 360 | 22.5 | 1.8 |
| Overcast night with no moon | 900 | 450 | 13.5 | 1.8 |
| Mist or light rain at night | 900 | 450 | 9 | .9 |
| Light fog, snow or heavy rain at night | 90 | 90 | 4.5 | .9 |
| Moderate fog, snow or torrential rain at night | 36 | 18 | 2.7 | .9 |
| Dense fog or blizzard at night | 1.8 | 1.8 | .9 | .9 |
| Scrub, brush or bush | Reduce all ranges by half | |||
| Light forest | Reduce all ranges by one fourth | |||
| Jungle or dense forest | Reduce all ranges by one eighth | |||
| Indoors | Visibility limited to line of sight | |||
| Hearing Ranges | |||
| Presented here is a table with the maximum distance a person can hear clearly. It is divided into how far away a person can hear a sound, distinguish what that sound is and an example of that sound. | |||
| Decibel | Hear sound | Distinguish sound | Example |
| 0 | 1 centimetre | Lowest threshold of hearing | |
| 10 | 3 centimetres | Light whisper | |
| 20 | 7 centimetres | 1 centimetre | Normal whisper |
| 30 | 15 centimetres | 3 centimetres | Murmuring in office |
| 40 | 30 centimetres | 7 centimetres | Subdued conversation |
| 50 | 60 centimetres | 15 centimetres | Average office |
| 60 | 2.5 metres | 30 centimetres | Average conversation |
| 70 | 10 metres | 60 centimetres | Busy street |
| 80 | 19 metres | 2.5 metres | Acoustic guitar |
| 90 | 77 metres | 10 metres | Heavy traffic |
| 100 | 308 metres | 19 metres | Subway/train |
| 110 | 615 metres | 77 metres | Power tools |
| 120 | 2458 metres | 308 metres | Thunder, rock band on stage |
| 130 | 5 kms | 615 metres | Airport |
| 140 | 10 kms | 2458 metres | Sonic boom |
| 150 | 20 kms | 5 kms | Permanent damage to hearing begins here |
| 160 | 40 kms | 10 kms | Jet engine |
| 180 | 80 kms | 20 kms | Rocket engine |
| 220 | 160 kms | 40 kms | Cannon |