Conversion of time difference and sound path distance or length millimeters time of arrival calculate calculation noise sound wave in air calculator - sengpielaudio
 
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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).

Time difference in (ms) 
or microseconds (µs) 		 ms µs   |    Distance in (m), centimeters 
(cm), feet (ft), or inches ('') 		 m cm ft  '' 
      |      
↓   |   ↓
      |      
Distance in meters (m)    |   Time difference in seconds: 
Centimeters (cm)    |   = seconds 
Feet (ft)    |   + Milliseconds 
Inches (")    |   + Microseconds 
                                          For the speed of sound of c = m / s ft / s                                                     
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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