免费声音距离计算器
根据声速和传播时间计算声源距离。
s
°C
距离
1,030.3 m
音速343.4 m/s
Distance (km)1.030 km
Distance vs Time Delay
公式
## Sound Distance By measuring the time between seeing an event and hearing it, you can estimate the distance. ### Formula **d = v_sound * t** where v_sound = 331.3 + 0.606 * T (m/s). A classic application: counting seconds between a lightning flash and thunder to estimate storm distance.
计算示例
Thunder arrives 3 seconds after lightning at 20 degrees C.
- 01v = 331.3 + 0.606 * 20 = 343.4 m/s
- 02d = 343.4 * 3
- 03d = 1030.3 m
- 04d = 1.030 km (about 1 km)
常见问题
Why can we ignore the time for light to travel?
Light travels at about 300,000 km/s, reaching us almost instantly. The entire delay is due to the much slower sound.
Is the 5-seconds-per-mile rule accurate?
Roughly. At 343 m/s, sound takes about 4.7 seconds per mile, so the 5-second rule is a reasonable approximation.
Does wind affect the calculation?
Yes. A headwind slows sound propagation and a tailwind speeds it up, which can shift the estimated distance.
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