seewave (version 1.5.5)

attenuation: 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.

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,dstop=150,n=200)