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range2tl

Compute underwater sound transmission loss from range

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Syntax

tl = range2tl(rng,freq,depth)

Description

example

tl= range2tl(rng,freq,depth)returns the transmission loss,tl, for a sound wave of frequencyfreqarriving from a source at distancerng。The channel depth isdepth。传输损耗是由于几何保存权杖ading and frequency-dependent absorption. This function is the inverse oftl2range。

Examples

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Open Live Script

Find the transmission loss (in dB) for a sonar operating at 2 kHz in a channel that is 200 m deep. The sound path is 1000.0 m long.

rng = 1000.0; freq = 2000.0; depth = 200; tl = range2tl(rng,freq,depth)
tl = 50.1261

Input Arguments

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Distance from sound source to receiver, specified as a positive scalar. Units are in meters.

Example:10e3

Data Types:double

Frequency of sound, specified as a positive scalar. Units are in Hz.

Example:1e3

Data Types:double

Channel depth, specified as a positive scalar. Units are in meters.

Example:200

Data Types:double

Output Arguments

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Transmission loss, returned as a positive scalar. Units are in dB.

Data Types:double

Limitations

  • The transmission loss model assumes that seawater salinity is 35 ppt, pH is 8, and temperature is 10°C.

  • The transmission loss model is valid for frequencies less than or equal to 2.0 MHz.

References

[1] Ainslie M. A. and J.G. McColm. "A simplified formula for viscous and chemical absorption in sea water."Journal of the Acoustical Society of America, Vol. 103, Number 3, 1998, pp. 1671--1672.

[2] Urick, Robert J.Principles of Underwater Sound, 3rd ed. Los Altos, CA:Peninsula Publishing, 1983.

Extended Capabilities

Version History

Introduced in R2017b

See Also

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