Conversion of time difference and sound path distance or length millimeters time of arrival calculate calculation

Time difference Δ t and sound path - distance or length d
conversion: Running time to milliseconds or microseconds ←→ sound path to meters, cm, feet or inches
The acoustic time of the travelling sound is converted to distance or the length is converted to time
converter: milliseconds and microseconds to seconds: Click here
converter: millimeters, centimeters and micrometers to meters: Click here

Notice: 1 second (s) = 1000 milliseconds (ms) and 0.001 second (s) = 1 millisecond (ms).
1 millisecond (ms) = 1000 microseconds (µs).

Fill in the gray fields above, select the unit and click on the calculation button of the respective
column. Also the adjusted speed of sound c can be changed: 343 m/s or 1125.33 ft/s at 20°C.
When converting seconds to distance, the seconds have to be multiplied by 1000 and entered in
the first field with the unit ms. The well known maximum value of the time difference from ear to
ear is 0.63 ms - and the strange "ear distance" that is believed to be 0.175 m = 17.5 cm.
Really? Do a calculation. c = d / Δ t d = Δ t × c Δ t = d / c d = distance

In SI units with dry air at 20 °C (68 °F), the speed of sound c is 343 m/s.
This also equates to 1235 km/h, 767 mph, and 1125 ft/s.

The time difference (duration) of sound per meter

Effect of temperature on the time difference Δ t
Dependence of the speed of sound only on the temperature of the air

Temperature of air in °C	Speed of sound c in m/s	Time per 1 m Δ t in ms/m
−25	315.7	3.165
−20	318.8	3.134
−15	322.0	3.103
−10	325.2	3.073
−5	328.2	3.044
0	331.3	3.017
5	334.3	2.990
10	337.3	2.963
15	340.3	2.937
20	343.2	2.912
25	346.2	2.888
30	349.1	2.864
35	352.0	2.840

Sound engineers take usually the rule of thumb:
For the distance of 1 m the sound needs nearly 3 ms.

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