### Strutt Help

Moving Point Source SEL Pass-By
^{1/1}
**Strutt|Propagation|SEL from Moving Point Source** inserts the Sound Exposure Level (SEL) from a moving point source into the active row of the worksheet.

The SEL from a moving point source is calculated by:

`SEL = L_max+10log_10((Kr)/V)`, where `K <= pi`

For an omnidirectional source, `K=pi`

A value of `K = 1.83` is suggested for aircraft noise. For diesel locomotives, the directivity characteristics of the source lead to a maximum value of 2.0 for `K`.

`V` is the velocity of moving point source.

`r` is the distance to the receiver.

References:

- Transportation Noise Reference Book p2/8

Comments or suggestions to
strutt@arup.com