attenuation: Generate sound intensity attenuation data

In seewave: Sound Analysis and Synthesis

Generate sound intensity attenuation data

Description

This function generates dB data following theoretical spherical attenuation of sound.

Usage

attenuation(lref, dref = 1, dstop, n, plot = TRUE,
xlab = "Distance (m)", ylab = "dB", type = "l", ...)

Arguments

lref	reference intensity or pressure level (in dB).
dref	reference distance corresponding to lref (in m.) (by default = 1).
dstop	maximal distance of propagation (in m.).
n	number of points generated between dref and dstop.
plot	logical, if TRUE plots attenuation against distance of propagation (by default TRUE).
xlab	title of the x axis.
ylab	title of the y axis.
type	if plot is TRUE, type of plot that should be drawn. See plot for details (by default "l" for lines).
...	other plot graphical parameters.

Value

If plot is FALSE return a numeric vector with the data generated.

Note

Sound attenuation in a free, unbounded medium behaves in accordance with the inverse square law. attenuation generates data following this rule from a reference point where sound intensity level (SIL) or sound pressure level (SPL) is known. Such theoretical data can be compared with experimental data collected in a real environment.

Author(s)

Jerome Sueur

References

Hartmann, W. M. 1998 Signals, sound and sensation. New York: Springer.

See Also

convSPL, moredB

Examples

# theoretical attenuation up to 150 m of a 100 dB/1m sound source
attenuation(lref=100, dref=1, dstop=150, n=200)

seewave documentation built on Oct. 19, 2023, 5:07 p.m.